How to Get Data

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All data is freely available under an open source license.

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In Stormwater Heatmap Version 2.0, the "data extraction page" (linked below) - which currently offers raster data - will be made more robust with the addition of time-series data and aggregated data. While the team works to enhance the website extraction interface, we have created a workaround to provide users with immediate access to Stormwater Heatmap data as described in the "Full-Extent Data Layer Downloads" section on this page. Learn more about this update by reading the ArcGIS Online Full-Extent Data Layer Downloads Now Available blog post.

Full-Extent Data Layer Downloads

We have made most of the Stormwater Heatmap data layers available for download at their full spatial extent and original resolution using the individual "download" links below.

Review the data before downloading them by visiting the View Data Layers tab and interacting with the "Select Layer Type" and "Display Layer" drop-downs. Find detailed information about the dataset development process, Google Earth Engine code links, and visualization details in the Documentation tab > Layer Reference on this website.

Click the "download" link to initiate the download process for any given data layer. The data will download as a GeoTIFF file; the file size for each is listed beside the layer name. The projection for all files is WGS 84. The resolution varies by layer and represents the finest resolution available based on the respective source data.

The pollution concentration data represent estimated modeled values that can be used to evaluate relative values across the region.

Age of Imperviousness (11.3 MB) download
Flow Duration Index (2.3 MB) download
HSPF Land Cover Type (43.9 MB) download
Hydrologic Response Units (99.4 MB) download
Imperviousness (2.8 MB) download
Land Cover (2.4 GB) download
Land Use (279.2MB) download
Population Density (11.4 MB) download
Precipitation (mm) (180.5 KB) download
Runoff (mm) (5.3 GB) download
Slope (9 GB) download
Slope Categories (1.1 GB) download
Soils (113.4 MB) download
Traffic (102.9 MB) download
Copper Concentration ug/L (1.6 GB) download
Phosphorus Concentration ug/L (1.6 GB) download
TKN Concentration ug/L (1.1 GB) download
TSS Concentration ug/L (1.1 GB) download
Zinc Concentration ug/L (1.2 GB) download

The same information provided above is cross-posted to a page hosted on ArcGIS Online titled Stormwaterheatmap.org Data Layers.