| ArcGIS REST Services Directory | Login |
| Home > services > texas_flood_202507 > FloodedAdminAreas_Infrastructure_Experimental (MapServer) | Help | API Reference |
| JSON | SOAP |
Date of Image(s)
Post-Event: July 9, 2025
Infrastructure data was extracted in early May 2025.
Date of Next Image
None planned
Summary
All analyses were based on UAVSAR Classified Images. The flooded areas are the results of a machine learning classification applied to UAVSAR data to identify open water flooding and inundation under tree canopy. Colored areas in the image show detected flooding, where the color shows the type of landcover which was flooded. Open water was not included. More information can be found here: https://maps.disasters.nasa.gov/arcgis/home/item.html?id=9e27403324db46ffacd8cf28018387a0
The flood imagery was used to identify administrative areas, structures, and critical infrastructure that may be a risk of flooding after an event.
Suggested Use
Classified Images:
Blue = Open Water
Red = Flooded Developed
Green = Flooded Vegetation
Orange = Flooded Crop
Processed layer - Areas of Interest: Each polygon in the administrative boundary is intersected with the vectorized flood fraction product. The symbolized output indicates the percentage of area as a fraction of total administrative boundary area that intersects with a pixel that is marked as flooded.
Processed layer - Infrastructure: A 10m buffer (equal to the flood model resolution) was created around each point and intersected with the vectorized flood product. The symbolized output indicates if the buffer corresponded with a flooded pixel, serving as a potential signal for exposed infrastructure. Unexposed infrastructure in the AOI is retained.
Processed layer - USA Structures: Each structure was intersected with the vectorized flood fraction product. The symbolized output indicates if the buffer corresponded with a flooded pixel, serving as a potential signal for exposed infrastructure. Unexposed infrastructure in the AOI is retained.
Satellite/Sensor:
UAVSAR airborne L-band synthetic aperture radar (SAR) aboard a NASA Gulfstream C-20A jet.
Resolution:
375 meters
Credits:
Flood Product:
UAVSAR data courtesy of NASA/JPL-Caltech
Added Value and Infrastructure Information:
Geospatial processing over infrastructure and administrative areas performed by the DRCO (drcs@nasa.gov).
Infrastructure data was gathered from HIFLD Open, with original data sources including the U.S. Army Corps of Engineers (National Inventory of Dams), Federal Highway Administration (Roads, the National Bridge Inventory), and various state and local sources (hospitals).
Structure data was gathered from the Federal Emergency Management Agency (FEMA) Structures database.
Administrative boundaries were collected from the U.S. Census Bureau's TIGER/Line Shapefiles.
Esri REST Endpoint:
See URL section on right side of page.