Air Quality Realtime

This dataset is made up of hourly measurements of PM2.5 and PM10, and meteorological measurements, collected through DOEE’s Purple Air network in the District of Columbia. The meteorological data collected are the sensor’s internal temperature and relative humidity readings. Measurements are collected to gain a better understanding of hyper-local air quality data. This data is collected through 24-hour continuous measurements.

Annual air quality data based on the parameters of CO, wind direction, humidity, NO2, O3, particulate matter, SO2

Monthly air quality data based on the parameters of CO, wind direction, humidity, NO2, O3, particulate matter, SO2.

Climate data include quality-controlled meteorological observations. Climate data is available as: 1. Station data for both Denmark and Greenland 2. Area data for Denmark only

This dataset contains Historic Landmarks (by structure) officially designated by the District of Columbia. This is a consolidated collection of structures with historical significance within the District of Columbia as listed in the "District of Columbia Inventory of Historic Sights". It contains the SITES and attributes of buildings, statues, bridges, forts, fountains, & memorials of historical worth. These sites in general are the lot or lots that a structure or other designation sits on.

The true color orthoimages were acquired as part of the DC Geographic Information System (DC GIS) and captured at 20cm resolution. A companion downloadable mosaic is available as a compressed MrSID format.