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Dates of Images: 20260724T1849, 20260725T1843, 20260727T1901 (GMT) (YYYYMMDDTHHMM) Summary: The Advanced Rapid Imaging and Analysis (ARIA) and Observational Products for End-Users from Remote Sensing Analysis (OPERA) teams at the Jet Propulsion Laboratory, California Institute of Technology produced maximum vegetation anomaly loss and disturbance status, using the OPERA Surface Disturbance Alert from Harmonized Landsat Sentinel-2 (DIST-ALERT-HLS) dataset. The dataset provided includes two product types: Vegetation Disturbance Status maps on individual dates Maximum Vegetation Anomaly loss maps on individual dates Dates and Input Data: Images: June 24, July 25, and July 27, 2026 Products are generated from OPERA DIST-ALERT-HLS satellite imagery and mosaicked across tiles to provide continuous coverage. Product Description: Surface Disturbance, specifically vegetation loss, is identified from optical satellite imagery and mapped at 30 m spatial resolution. The Vegetation Disturbance Status layer indicates the confidence that vegetation loss has occurred, and whether the disturbance is still ongoing or has ended. The Max Vegetation Anomaly loss shows how much vegetation has been lost at each location, based on the largest change observed during the time period. As the number of post-event images increase, the confidence in the detections increases. Note we applied a temporal filter to these products. The temporal filter was used to remove any surface disturbance that occurred prior to the onset of the wildfires. Caveats and Limitations: This product detects vegetation loss due to any reason. Importantly, not all detected changes are due to wildfire on July 23, 2026. These results are intended to support rapid emergency response. All information is provisional for use under emergency response guidelines. These data are provided with absolutely no warranty of any kind. Use at your own risk. Suggested Use: The OPERA DIST-ALERT-HLS maps per pixel vegetation disturbance (specifically, vegetation cover loss) from the Harmonized Landsat Sentinel-2 (HLS) scenes. We provide the (1) maximum vegetation anomaly value (VEG-ANOM-MAX) layer and (2) vegetation disturbance status (VEG-DIST-STATUS). All provided layers have been filtered to include only disturbance detected following the start of the fires. VEG-ANOM-MAX: Difference between 3 year historical baseline and current year observed vegetation cover at the date of maximum decrease (vegetation loss of 0-100%). This layer can be used to threshold vegetation disturbance per a given sensitivity (e.g. disturbance of >=20% vegetation cover loss). Layer Values: 0-100: Maximum loss of percent vegetation (suggested color: white to red gradient) 255: No data (suggested color: transparent) File names: OPERA_L3_DIST-ALERT-HLS_V1_VEG-ANOM-MAX_20260724T1849_mosaic.tif, OPERA_L3_DIST-ALERT-HLS_V1_VEG-ANOM-MAX_20260725T1843_mosaic.tif, OPERA_L3_DIST-ALERT-HLS_V1_VEG-ANOM-MAX_20260727T1901_mosaic.tif VEG-DIST-STATUS: Indication of vegetation cover loss (vegetation disturbance). The status label is based on the maximum anomaly value, confidence level, and whether it is ongoing or finished. ''First'' means the pixel has had an anomaly detection but no subsequent observations whether anomalous or not. ''Provisional'' means there have been two consecutive disturbance detections but not yet with high confidence. ''Confirmed'' means that vegetation disturbance is detected with high confidence. The label ''finished'' is applied to confirmed disturbances that have had two consecutive no-anomaly observations or one 15 days or more after the last anomaly detection. If a new disturbance is detected, it will overwrite those in a ''finished'' state. These labels are reported for both above and below the 50% disturbance threshold based on the maximum anomaly value. Layer Values: 0: No disturbance (suggested color: #121212) 1: first 2: provisional 3: confirmed 4: first >=50% (suggested color: #008888) 5: provisional >=50% (suggested color: #e48727) 6: confirmed >=50% (suggested color: #e01b07) 7: confirmed 8: confirmed >=50%, finished (suggested color: #dddddd) 255: No data (suggested color: transparent) File names: OPERA_L3_DIST-ALERT-HLS_V1_VEG-DIST-STATUS_20260724T1849_mosaic.tif, OPERA_L3_DIST-ALERT-HLS_V1_VEG-DIST-STATUS_20260725T1843_mosaic.tif, OPERA_L3_DIST-ALERT-HLS_V1_VEG-DIST-STATUS_20260727T1901_mosaic.tif Satellite/Sensor/Resolution: Satellite/Sensor: Harmonized Landsat Sentinel-2 (HLS) derived from MultiSpectral Instrument (MSI) on European Space Agency's (ESA) Copernicus Sentinel-2A/2B/2C satellites and Operational Land Imager 2 (OLI-2) on NASA/USGS Landsat 8/9 satellites. Spatial Resolution: 30 meters Temporal Resolution: Sub-weekly Credits: The product contains modified Copernicus Sentinel-2 and NASA Landsat 8/9 data, processed by the European Space Agency and NASA. Data were analyzed by the NASA-JPL/Caltech ARIA/OPERA team. The DIST products are produced as part of the OPERA project, which is funded by NASA to address remote sensing needs identified by the Satellite Needs Working Group, and managed by NASA's Jet Propulsion Laboratory. The DIST-ALERT-HLS product was developed and produced by the OPERA Global Land Analysis and Discovery (GLAD) laboratory at the University of Maryland. NASA JPL-Caltech-UMD ARIA/OPERA Team Product POCs: Cole Speed (cole.speed@jpl.nasa.gov) Mary Grace Bato (bato@jpl.nasa.gov) Alexander Handwerger (alexander.handwerger@jpl.nasa.gov ) Esri REST Endpoint: See URL to the right. WMS Endpoint: https://gis.earthdata.nasa.gov/portal/services/DISASTERS_202607_FIRE_OR/202618_opera_dist_vegDistStatus/ImageServer/WMSServer Data Download: https://aria-share.jpl.nasa.gov/20260723_Oregon_Fires/
Formaldehyde Overview and Intended UseMultiple sources contribute to ambient formaldehyde including but not limited to wildfire emissions, industrial activities, and secondary production resulting from the oxidation of other compounds emitted by industries and vegetations. Formaldehyde is a carcinogenic, hazardous air pollutant. While ambient formaldehyde concentrations are usually below U.S. federal recommendations, ambient exposure can cause health issues in people. In addition to measuring formaldehyde for its impacts on human health, satellite formaldehyde observations are also extremely valuable in understanding atmospheric chemistry and production of ground-level ozone. Layer OverviewThe Tropospheric Emissions: Monitoring of Pollution (TEMPO) Formaldehyde Vertical Column Near Real-Time (NRT) layer provides information on the amount of formaldehyde in the atmosphere as a vertical column density, calculated in molecules per square centimeter (molecules/cm^2). In other words, the total number of formaldehyde molecules present in the atmosphere from the Earth’s surface to the top of the atmosphere over an area of one square centimeter. Typical values range from 0 to 6e16 molecules/cm^2, though certain events like wildfires may cause these limits to be exceeded. The TEMPO NRT formaldehyde files are produced using a fast version of the TEMPO baseline retrieval processor. TEMPO NRT formaldehyde Level 3 files provide trace gas information on a regular grid. Level 3 files are derived by combining information from all Level 2 files constituting a TEMPO East-West scan cycle, using an area-weighted re-gridding approach. The NRT processing optimizes radiance calibration, image navigation and registration, and cloud and trace gas retrievals for rapid processing, while ensuring that product quality is sufficient for most NRT applications. The data have been converted from their native file format (netCDF4) to Cloud Raster Format (CRF). Temporal CoverageThe temporal resolution of a nominal scan is approximately one hour during daylight hours, with more frequent scans in the morning over the eastern portion of the field of regard and in the evenings over the western portion of the field of regard. Each image is presented with the starting timestamp of the corresponding TEMPO scan. Due to the nature of the TEMPO instrument’s east to west scanning pattern, each image is a composite of measurements taken over a period of 40-60 minutes, depending on the spatial coverage of the scan. Data are updated hourly with any new scans that have been received. Data older than two days (48 hours) are removed from the service. On the rare occasion that the TEMPO instrument is not collecting data for an extended period of time, this service will retain only the latest scan until operations resume. The TEMPO operations log may be found on the TEMPO site. Geographic CoverageImagery is available for the TEMPO field of regard covering the continental United States (CONUS), and much of Mexico, Canada, and the Caribbean. The imagery in this image service is regridded onto a 0.02º longitude x 0.02º latitude grid and presented in the geographic coordinate system WGS 1984. The sensor’s native spatial resolution is ~2 km x 4.75 km at the center of TEMPO’s field of regard (33.5°N, 89.2°W) in WGS 1984. Data FilteringThe layer is filtered to remove low-quality pixels using the main data quality flag (removing low confidence measurements), solar zenith angle (removing data retrieved at high solar zenith angles), and effective cloud fraction (removing data where clouds obscure the tropospheric column) variables. The filters applied are set to remove pixels based on the following: main_data_quality_flag > 1, eff_cloud_fraction > 0.5, or solar_zenith_angle > 80. Data Validation and Limitations of UseThese data should be considered as provisional products per the Provisional Product Maturity level defined in the TEMPO validation plan. These data are at provisional maturity, which means that product performance has been demonstrated through a large, but still (seasonally or otherwise) limited number of independent measurements. The analysis is sufficient for limited qualitative determinations of product fitness-for-purpose, and the product is potentially ready for testing by operational users and may be suitable for scientific publication. Users may consult the TEMPO User Guide for descriptions of the data and associated known issues. The information shown here is total column density (molecules per unit area for the whole vertical column of the atmosphere), not a concentration. Atmospheric concentration refers to the fractional amount of trace gas (e.g., formaldehyde) relative to total air at a specific point, and changes with altitude. Conversion from total column density to atmospheric concentration requires additional information, such as the state of the atmosphere and the vertical distribution of the column, which are not provided in this layer. The use of this layer to derive atmospheric concentrations of formaldehyde is discouraged for the non-specialist. Recommended Usage NotesWhen viewing the image service in the Esri online map viewer, it is recommended to use the multidimensional slider rather than the default time slider. The multidimensional slider can be accessed via the “multidimensional” icon in the right-hand menu. While qualitative analyses and general trends may remain similar between the TEMPO standard and NRT versions, merging versions for quantitative analysis is discouraged. Standard and NRT formaldehyde retrievals differ due to differences in the differential formaldehyde slant column densities derived through spectral fitting due to (1) the use of a different radiance reference and (2) the omission of the radiance wavelength calibration in the L1 NRT processing. For details on the changes in the data, please see the TEMPO User Guide and the TEMPO NRT Data Products User Guide and ATBD Supplement on the TEMPO site. The TEMPO NRT ArcGIS service provides access to TEMPO formaldehyde NRT data earlier than the TEMPO standard formaldehyde data are available in the standard formaldehyde ArcGIS service. The TEMPO NRT products are useful for applications with low-latency requirements; however, it is recommended to switch to the TEMPO Formaldehyde Standard Version 04 (V04) service, once the data becomes available in that service. TEMPO V04 data are available from September 17, 2025 to present and the service is updated daily with the previous day’s data. TEMPO Mission OverviewThe Tropospheric Emissions: Monitoring of Pollution (TEMPO) instrument is a grating spectrometer, sensitive to visible (VIS) and ultraviolet (UV) wavelengths of light with a spectral range of 290-490 + 540-740 nm and 0.6 nm spectral resolution. The TEMPO instrument is attached to the Earth-facing side of a commercial telecommunications satellite (Intelsat 40e) in geostationary orbit over 91˚ W longitude (about 22,000 miles above Earth’s equator). This allows TEMPO to maintain a continuous view of North America so that the instrument's light-collecting mirror can make a complete east-to-west scan of the field of regard hourly during daylight hours. By measuring sunlight reflected and scattered from the Earth's surface and atmosphere back to the instrument's detectors, TEMPO's ultraviolet and visible light sensors provide measurements of ozone, nitrogen dioxide, formaldehyde, and other constituents involved in the chemical dynamics of Earth’s atmosphere. The primary mission objective of TEMPO is to improve our understanding of air quality and its impacts. By providing near real-time data and comprehensive atmospheric composition measurements, TEMPO helps advance knowledge of the Earth system and improve air quality forecasting. These data also aid in quantifying how air quality affects vegetation, agriculture, and human health. ContactFor inquiries about this service, please contact larc-dl-asdc-tempo@mail.nasa.gov or post/view questions on the Earthdata Forum.
Formaldehyde Overview and Intended Use Multiple sources contribute to ambient formaldehyde including but not limited to wildfire emissions, industrial activities, and secondary production resulting from the oxidation of other compounds emitted by industries and vegetations. Formaldehyde is a carcinogenic, hazardous air pollutant. While ambient formaldehyde concentrations are usually below U.S. federal recommendations, ambient exposure can cause health issues in people. In addition to measuring formaldehyde for its impacts on human health, satellite formaldehyde observations are also extremely valuable in understanding atmospheric chemistry and production of ground-level ozone. Layer Overview The Tropospheric Emissions: Monitoring of Pollution (TEMPO) Formaldehyde Vertical Column layer provides information on the amount of formaldehyde in the atmosphere as a vertical column density, calculated in molecules per square centimeter (molecules/cm^2). In other words, the total number of formaldehyde molecules present in the atmosphere from the Earth’s surface to the top of the atmosphere over an area of one square centimeter. Typical values range from 0 to 6e16 molecules/cm^2, though certain events like wildfires may cause these limits to be exceeded. Formaldehyde Level 3 files provide trace gas information on a regular grid consisting of 0.02° x 0.02° grid points across the TEMPO field of regard covering the continental United States (CONUS), much of Mexico, Canada, and the Caribbean. Level 3 files are derived by combining information from all Level 2 files constituting a TEMPO East-West scan cycle, using an area-weighted re-gridding approach. The data have been converted from their native file format (netCDF4) to Cloud Raster Format (CRF). TEMPO V04 algorithms address known issues in the V03, improving data quality. As a result, there are differences between the TEMPO V03 and V04 data. While qualitative analyses and general trends may remain similar between both versions, merging versions for quantitative analysis is discouraged. For details on the changes in the data, please see the User Guide on the TEMPO site. Temporal CoverageThe temporal resolution of a nominal scan is approximately one hour during daylight hours, with more frequent scans in the morning over the eastern portion of the field of regard and in the evenings over the western portion of the field of regard. Each image is presented with the starting timestamp of the corresponding TEMPO scan. Due to the nature of the TEMPO instrument’s east to west scanning pattern, each image is a composite of measurements taken over a period of 40-60 minutes, depending on the spatial coverage of the scan. This service was created using TEMPO data version (V03), which was released publicly on May 24, 2024, and cover the time period from August 2, 2023 to September 16, 2025. TEMPO Version 04 (V04) Level 1, 2, and 3 standard data products began production on September 17, 2025. All observations since the beginning of the mission are being reprocessed with V04 algorithms, with V04 products becoming publicly available as they are reprocessed. The TEMPO V04 data are accessible via this service. Once the V03 data reprocessing is completed, this V03 service will be deprecated. Geographic CoverageImagery is available for the TEMPO field of regard covering the continental United States (CONUS), much of Mexico, Canada, and the Caribbean. The imagery in this image service is regridded onto a 0.02º longitude x 0.02º latitude grid and presented in the geographic coordinate system WGS 1984. The sensor’s native spatial resolution is ~2 km x 4.75 km at the center of TEMPO’s field of regard (33.5°N, 89.2°W) in WGS 1984. Data FilteringThe layer is filtered to remove low-quality pixels using the main data quality flag (removing low confidence measurements), solar zenith angle (removing data retrieved at high solar zenith angles), and effective cloud fraction (removing where clouds obscure the column) variables. The filters applied are set to remove pixels based on the following: main_data_quality_flag > 1, eff_cloud_fraction > 0.5, and solar_zenith_angle > 80. Data Validation and Limitations of UseThese data should be considered as provisional products per the Provisional Product Maturity level defined in the TEMPO validation plan. These data are at provisional maturity, which means that product performance has been demonstrated through a large, but still (seasonally or otherwise) limited number of independent measurements. The analysis is sufficient for limited qualitative determinations of product fitness-for-purpose, and the product is potentially ready for testing by operational users and may be suitable for scientific publication. Users may consult the TEMPO User Guide for descriptions of the data and associated known issues. The information shown here is total column density (molecules per unit area for the whole vertical column of the atmosphere), not a concentration. Atmospheric concentration refers to the amount of trace gas (e.g., formaldehyde) in a specific point (in this case altitude). Conversion from total column density to atmospheric concentration requires additional information, such as the state of the atmosphere and the vertical distribution of the column, which are not provided in this layer. The use of this layer to derive atmospheric concentrations of formaldehyde is discouraged for the non-specialist. Recommended Usage NotesWhen viewing the image service in the Esri online map viewer, it is recommended to use the multidimensional slider rather than the default time slider. The multidimensional slider can be accessed via the “multidimensional” icon in the right-hand menu. TEMPO Mission Overview The TEMPO instrument is a grating spectrometer, sensitive to visible (VIS) and ultraviolet (UV) wavelengths of light with a spectral range of 290-490 + 540-740 nm and 0.6 nm spectral resolution. The TEMPO instrument is attached to the Earth-facing side of a commercial telecommunications satellite (Intelsat 40e) in geostationary orbit over 91˚ W longitude (about 22,000 miles above Earth’s equator). This allows TEMPO to maintain a continuous view of North America so that the instrument's light-collecting mirror can make a complete east-to-west scan of the field of regard hourly during daylight hours. By measuring sunlight reflected and scattered from the Earth's surface and atmosphere back to the instrument's detectors, TEMPO's ultraviolet and visible light sensors provide measurements of ozone, nitrogen dioxide, formaldehyde, and other constituents involved in the chemical dynamics of Earth’s atmosphere. The primary mission objective of TEMPO is to improve our understanding of air quality and its impacts. By providing near real-time data and comprehensive atmospheric composition measurements, TEMPO helps advance knowledge of the Earth system and improve air quality forecasting. These data also aid in quantifying how air quality affects vegetation, agriculture, and human health. ContactFor inquiries about this service, please contact larc-dl-asdc-tempo@mail.nasa.gov or post/view questions on the Earthdata Forum.
uav imagery by Sean Frey, acquired 2025-08-08 to 2025-08-08, 3.6 cm per pixel, published on OpenAerialMap.
Preliminary NFHL data containing flood risks and regulatory flood determination data. This data is not yet effective.
The National Flood Hazard Layer (NFHL) is a geospatial database that contains current effective flood hazard data. FEMA provides the flood hazard data to support the National Flood Insurance Program. You can use the information to better understand your level of flood risk and type of flooding. The NFHL is made from effective flood maps and Letters of Map Change (LOMC) delivered to communities. New and revised data is being added continuously. For more information National Flood Hazard Layer.
Formaldehyde Overview and Intended Use Multiple sources contribute to ambient formaldehyde including but not limited to wildfire emissions, industrial activities, and secondary production resulting from the oxidation of other compounds emitted by industries and vegetations. Formaldehyde is a carcinogenic, hazardous air pollutant. While ambient formaldehyde concentrations are usually below U.S. federal recommendations, ambient exposure can cause health issues in people. In addition to measuring formaldehyde for its impacts on human health, satellite formaldehyde observations are also extremely valuable in understanding atmospheric chemistry and production of ground-level ozone. Layer Overview The Tropospheric Emissions: Monitoring of Pollution (TEMPO) Formaldehyde Vertical Column layer provides information on the amount of formaldehyde in the atmosphere as a vertical column density, calculated in molecules per square centimeter (molecules/cm^2). In other words, the total number of formaldehyde molecules present in the atmosphere from the Earth’s surface to the top of the atmosphere over an area of one square centimeter. Typical values range from 0 to 6e16 molecules/cm^2, though certain events like wildfires may cause these limits to be exceeded. Formaldehyde Level 3 files provide trace gas information on a regular grid consisting of 0.02° x 0.02° grid points across the TEMPO field of regard covering the continental United States (CONUS), much of Mexico, Canada, and the Caribbean. Level 3 files are derived by combining information from all Level 2 files constituting a TEMPO East-West scan cycle, using an area-weighted re-gridding approach. The data have been converted from their native file format (netCDF4) to Cloud Raster Format (CRF). Temporal CoverageThe temporal resolution of a nominal scan is approximately one hour during daylight hours, with more frequent scans in the morning over the eastern portion of the field of regard and in the evenings over the western portion of the field of regard. Each image is presented with the starting timestamp of the corresponding TEMPO scan. Due to the nature of the TEMPO instrument’s east to west scanning pattern, each image is a composite of measurements taken over a period of 40-60 minutes, depending on the spatial coverage of the scan. Data are available from September 17, 2025 to present and updated daily with the previous day’s data.The previous TEMPO data version (V03) was released publicly on May 24, 2024, and cover the time period from August 2, 2023 to September 16, 2025. All observations since the beginning of the mission are being reprocessed with V04 algorithms, with V04 products becoming publicly available in this service as they are reprocessed. The TEMPO V03 data are accessible via this service. Once the V03 data reprocessing is completed, the V03 service will be deprecated. Geographic CoverageImagery is available for the TEMPO field of regard covering the continental United States (CONUS), much of Mexico, Canada, and the Caribbean. The imagery in this image service is regridded onto a 0.02º longitude x 0.02º latitude grid and presented in the geographic coordinate system WGS 1984. The sensor’s native spatial resolution is ~2 km x 4.75 km at the center of TEMPO’s field of regard (33.5°N, 89.2°W) in WGS 1984. Data FilteringThe layer is filtered to remove low-quality pixels using the main data quality flag (removing low confidence measurements), solar zenith angle (removing data retrieved at high solar zenith angles), and effective cloud fraction (removing where clouds obscure the column) variables. The filters applied are set to remove pixels based on the following: main_data_quality_flag > 1, eff_cloud_fraction > 0.5, or solar_zenith_angle > 80. Data Validation and Limitations of UseThese data should be considered as provisional products per the Provisional Product Maturity level defined in the TEMPO validation plan. These data are at provisional maturity, which means that product performance has been demonstrated through a large, but still (seasonally or otherwise) limited number of independent measurements. The analysis is sufficient for limited qualitative determinations of product fitness-for-purpose, and the product is potentially ready for testing by operational users and may be suitable for scientific publication. Users may consult the TEMPO User Guide for descriptions of the data and associated known issues. TEMPO V04 algorithms address known issues in the V03, improving data quality. As a result, there are differences between the TEMPO V03 and V04 data. While qualitative analyses and general trends may remain similar between both versions, merging versions for quantitative analysis is discouraged. For details on the changes in the data, please see the User Guide on the TEMPO site. Note: The information shown here is total column density (molecules per unit area for the whole vertical column of the atmosphere), not a concentration. Atmospheric concentration refers to the amount of trace gas (e.g., formaldehyde) in a specific point (in this case altitude). Conversion from total column density to atmospheric concentration requires additional information, such as the state of the atmosphere and the vertical distribution of the column, which are not provided in this layer. The use of this layer to derive atmospheric concentrations of formaldehyde is discouraged for the non-specialist. Recommended Usage NotesWhen viewing the image service in the Esri online map viewer, it is recommended to use the multidimensional slider rather than the default time slider. The multidimensional slider can be accessed via the “multidimensional” icon in the right-hand menu. TEMPO Mission Overview The TEMPO instrument is a grating spectrometer, sensitive to visible (VIS) and ultraviolet (UV) wavelengths of light with a spectral range of 290-490 + 540-740 nm and 0.6 nm spectral resolution. The TEMPO instrument is attached to the Earth-facing side of a commercial telecommunications satellite (Intelsat 40e) in geostationary orbit over 91˚ W longitude (about 22,000 miles above Earth’s equator). This allows TEMPO to maintain a continuous view of North America so that the instrument's light-collecting mirror can make a complete east-to-west scan of the field of regard hourly during daylight hours. By measuring sunlight reflected and scattered from the Earth's surface and atmosphere back to the instrument's detectors, TEMPO's ultraviolet and visible light sensors provide measurements of ozone, nitrogen dioxide, formaldehyde, and other constituents involved in the chemical dynamics of Earth’s atmosphere. The primary mission objective of TEMPO is to improve our understanding of air quality and its impacts. By providing near real-time data and comprehensive atmospheric composition measurements, TEMPO helps advance knowledge of the Earth system and improve air quality forecasting. These data also aid in quantifying how air quality affects vegetation, agriculture, and human health. ContactFor inquiries about this service, please contact larc-dl-asdc-tempo@mail.nasa.gov or post/view questions on the Earthdata Forum.
Map service that provides a legend for the FEMA National Flood Hazard Layer. Display this along with the FEMA NFHL tiled map service at https://tiles.arcgis.com/tiles/hGdibHYSPO59RG1h/arcgis/rest/services/FEMA_National_Flood_Hazard_Layer/MapServer (metadata at https://massgis.maps.arcgis.com/home/item.html?id=630c74171705455592a8fa947c3f849f), which, being a tiled service hosted at ArcGIS Online, does not have a legend associated with it when displayed in ArcGIS Online or ArcGIS for Desktop.
This dataset is a tile mosaic of 1-meter aerials of the City of Tacoma from 1990.Contact Info: Contact Info: GIS Team Email: GISteam@cityoftacoma.org Company: U.S. Geological Survey Flight Time: July, 1990 Filename: Digital Orthophoto Quarter Quadrangles (HTM) Earth Explorer Full Display Record 1 (HTM)
Wisconsin Flood Risk Management Application spatial data map service.
Table containing surface water quality monitoring information for Sioux Falls, South Dakota.
Preliminary NFHL data containing flood risks and regulatory flood determination data. This data is not yet effective.
FEMA PRELIMINARY Flood Hazard Layers For more information, visit: https://hazards.fema.gov/femaportal/wps/portal/NFHLWMS
Overview The National Flood Hazard Layer (NFHL) dataset represents the current effective flood data for the country, where maps have been modernized. It is a compilation of effective Flood Insurance Rate Map (FIRM) databases and Letters of Map Revision (LOMRs). The NFHL is updated as studies go effective. For more information, visit FEMA's Map Service Center (MSC). Base Map Considerations The default base map conforms to FEMA's specification for horizontal accuracy. This map should be considered the best online resource to use for official National Flood Insurance Program (NFIP) purposes when determining locations in relation to regulatory flood hazard information. If a different base map is used with the NFHL, the accuracy specification may not be met and the resulting map should be used for general reference only, and not official NFIP purposes. For FEMA’s policy on the use of digital flood hazard data for NFIP purposes see: Standards for Flood Risk Products. Questions? Contact a map specialist. Further Information FEMA Flood Data Viewers and Geospatial Data
Ozone Overview and Intended Use Ozone (O₃) is a gas composed of three oxygen atoms and is naturally present in our atmosphere. It has a profound influence on life on Earth and the atmosphere. It exists in different layers of the atmosphere, with the largest abundance in the stratosphere, where it forms the ozone layer. This layer absorbs harmful ultraviolet (UV) radiation from the Sun, preventing it from reaching the surface and reducing the risk of skin cancer, cataracts, and other health issues, while also protecting ecosystems. However, ozone near the ground is a major pollutant that can cause respiratory problems and environmental damage. In addition, ozone plays a critical role in the oxidizing capacity of the troposphere and acts as an important greenhouse gas in the upper troposphere and lower stratosphere. Therefore, we monitor total column ozone and its vertical distribution using various instruments such as satellites and ground-based observations. These observations usually provide the ozone columns as Dobson Units (DU), which is a unit of measurement of the amount of a trace gas in a vertical column through the Earth’s atmosphere. Per the definition of Dobson units, 1 Dobson Unit corresponds to a 0.01 mm thick ozone layer at standard atmospheric conditions (0°C (or 273.15 K), 1 atm (or 1013.25 hPa)). Understanding and tracking ozone levels is crucial for assessing environmental changes, monitoring ozone depletion, and ensuring the continued protection of life on Earth. Layer Overview The Tropospheric Emissions: Monitoring of Pollution (TEMPO) Gridded Total Column Ozone layer provides information on the amount of ozone in the atmosphere as a total column, expressed in Dobson Units (DU). In other words, it represents the total amount of ozone molecules present in the atmosphere from the Earth’s surface to the top of the atmosphere. Ozone Level 3 files provide trace gas information on a regular grid consisting of 0.02° x 0.02° grid points across the field of regard. Level 3 files are derived by combining information from all Level 2 files constituting a TEMPO East-West scan cycle, using an area-weighted re-gridding approach. The data have been converted from their native file format (netCDF4) to Cloud Raster Format (CRF). Temporal Coverage The temporal resolution of a nominal scan is approximately one hour during daylight hours, with more frequent scans in the morning over the eastern portion of the field of regard and in the evenings over the western portion of the field of regard. Each image is presented with the starting timestamp of the corresponding TEMPO scan. Due to the nature of the TEMPO instrument’s east to west scanning pattern, each image is a composite of measurements taken over a period of 40-60 minutes, depending on the spatial coverage of the scan. Data are available from September 17, 2025 to present and updated daily with the previous day’s data. The previous TEMPO data version (V03) was released publicly on May 24, 2024, and cover the time period from August 2, 2023 to September 16, 2025. All observations since the beginning of the mission are being reprocessed with V04 algorithms, with V04 products becoming publicly available in this service as they are reprocessed. The TEMPO V03 data are accessible via this service. Once the V03 data reprocessing is completed, the V03 service will be deprecated. Geographic Coverage Imagery is available for the TEMPO field of regard covering the continental United States (CONUS), much of Mexico, Canada, and the Caribbean. The imagery in this image service is regridded onto a 0.02º longitude x 0.02º latitude grid and presented in the geographic coordinate system WGS 1984. The sensor’s native spatial resolution is ~2 km x 4.75 km at the center of TEMPO’s field of regard (33.5°N, 89.2°W) in WGS 1984. Data Filtering The layer is filtered to remove low-quality pixels based using the solar zenith angle (removing data retrieved at high solar zenith angles) and viewing zenith angle (removing data retrieved at high viewing zenith angles). The applied filters remove pixels based on the following: solar_zenith_angle > 80 or viewing_zenith_angle > 80. The filtering using the quality flag is pre-applied during the Level 3 data generation process to remove pixels based on quality_flag is not 0, 1, 2, or 5. Data Validation and Limitations of Use These data should be considered as provisional products per the Provisional Product Maturity level defined in the TEMPO validation plan. These data are at provisional maturity, which means that product performance has been demonstrated through a large, but still (seasonally or otherwise) limited number of independent measurements. The analysis is sufficient for limited qualitative determinations of product fitness-for-purpose, and the product is potentially ready for testing by operational users and may be suitable for scientific publication. Users may consult the user guide for descriptions of the data and associated known issues. TEMPO V04 algorithms address known issues in the V03, improving data quality. As a result, there are differences between the TEMPO V03 and V04 data. While qualitative analyses and general trends may remain similar between both versions, merging versions for quantitative analysis is discouraged. For details on the changes in the data, please see the User Guide on the TEMPO site. Recommended Usage Notes When viewing the image service in the ESRI online map viewer, it is recommended to use the multidimensional slider rather than the default time slider. The multidimensional slider can be accessed via the “multidimensional” icon in the right-hand menu. TEMPO Mission Overview The TEMPO instrument is a grating spectrometer, sensitive to visible (VIS) and ultraviolet (UV) wavelengths of light with a spectral range of 290-490 + 540-740 nm and 0.6 nm spectral resolution. The TEMPO instrument is attached to the Earth-facing side of a commercial telecommunications satellite (Intelsat 40e) in geostationary orbit over 91˚ W longitude (about 22,000 miles above Earth’s equator). This allows TEMPO to maintain a continuous view of North America so that the instrument's light-collecting mirror can make a complete east-to-west scan of the field of regard hourly during daylight hours. By measuring sunlight reflected and scattered from the Earth's surface and atmosphere back to the instrument's detectors, TEMPO's UV and VIS light sensors provide measurements of ozone, nitrogen dioxide, formaldehyde, and other constituents involved in the chemical dynamics of Earth’s atmosphere. The primary mission objective of TEMPO is to improve our understanding of air quality and its impacts. By providing near real-time data and comprehensive atmospheric composition measurements, TEMPO helps advance knowledge of the Earth system and improve air quality forecasting. These data also aid in quantifying how air quality affects vegetation, agriculture, and human health. Contact For inquiries about this service, please contact larc-dl-asdc-tempo@mail.nasa.gov or post/view questions on the Earthdata Forum.
Wisconsin Flood Risk Management Application spatial data map service.
Wisconsin Flood Risk Management Application spatial data map service.
uav imagery by gber62, acquired 2026-01-01 to 2026-01-01, 5.0 cm per pixel, published on OpenAerialMap.
This map titled Existing Land Use 1971, depicts land use across the towns and townships that made up York Region at the time. Land uses are categorized using a colour-coded legend identifying residential, commercial, industrial, institutional, open space, pits and quarries, and transportation/utilities. The map highlights concentrated urban development in the southern municipalities, while much of the region remained rural and agricultural, with scattered settlements and resource extraction sites. Compiled from aerial photography and base mapping available in 1970-1971, the map serves as an important reference for understanding historic growth patterns and land use planning in York Region. This map has been georeferenced to York Region for comparison with modern datasets, a process which aligns it with current geographic coordinates. Georeferencing improves the map's spatial accuracy and enables comparison with contemporary mapping, while preserving the original content. Minor spatial discrepancies may exist due to variations in the original map coordinate system versus modern coordinate systems.
This feature class contains the watercourse line geometry for the New Brunswick Hydrographic Network. It contains observed streams as well as inferred centrelines representing an approximate centreline path through waterbodies and around islands within the waterbodies. The data has been collected for the entire province from a period from 2003 to present and is being continuously updated. The first release of the NBHN was in January of 2012. The metadata document can be downloaded from https://nbdnr.maps.arcgis.com/sharing/rest/content/items/d5f765b86027426c90c97c820c1a3309/data Classe d’entités comprenant des données sur les cours d’eau en géométrie de ligne pour le Réseau hydrographique du Nouveau-Brunswick (RHNB). Elle comprend les cours d’eau observés ainsi que les lignes médianes dérivées qui représentent une voie médiane approximative dans les plans d’eau et autour des îles qui se trouvent dans les plans d’eau. Ces données sont recueillies pour l’ensemble de la province depuis 2003 et sont mises à jour de façon continue. Les données du RHNB ont été diffusées pour la première fois en janvier 2012. Le document de métadonnées peut être téléchargé à partir de https://nbdnr.maps.arcgis.com/sharing/rest/content/items/d5f765b86027426c90c97c820c1a3309/data