Geography2020 census tracts; 50 states and DC
Release2025 SRAM parser v1
Available records252,357
What you can build
2025 food access indicators; driving and straight-line distance remain distinct. Use this dataset as a sourced input to an application, analytical model or retrieval tool. Retain its native dimensions when joining it with your own records.
Query USDA SNAP-authorized Retailer Access Map
The example below is a real bounded request against the available release. Replace the environment variable with your server-side API credential. Review endpoint parameters and response schemas before changing selectors.
Verified API request
curl --fail --get "https://api.geoamcan.com/v1/food-access?dataset=usda-sram&limit=1&geo_type=tract&geoid=01001020100&vintage=2020" \
-H "Authorization: Bearer $GEOAMCAN_API_KEY"Saved response excerpt
{
"source_attribution": {
"usda-sram": "USDA ERS — USDA SNAP-authorized Retailer Access Map; https://ers.usda.gov/data-products/food-access-research-atlas/download-the-data; official source snapshots, no endorsement implied."
},
"requested_area": {
"include_geometry": false,
"dataset": "usda-sram",
"lat": null,
"lon": null,
"geo_type": "tract",
"geoid": "01001020100",
"vintage": "2020",
"designation_id": null,
"area": null
},
"data": [
{
"dataset": "usda-sram",
"source": "USDA ERS",
"release": "2025 SRAM parser v1",
"geographic_resolution": "tract",
"geoid": "01001020100",
"geography_vintage": "2020",
"period": "2025",
"naics": "",
"component": "SRAM Driving Distance Data.csv",
"metrics": {
"DD_SRAM_lapop1": 1469,
"DD_SRAM_laaian1": 4,
"DD_SRAM_lahisp1": 63,
"DD_SRAM_lahunv1": 29,
"DD_SRAM_lakids1": 335,
"DD_SRAM_lalowi1": 1089,
"DD_SRAM_lapop10": 0,
"DD_SRAM_lapop20": 0,
"DD_SRAM_lasnap1": 83,
"DD_SRAM_HUNVFlag": 0,
"DD_SRAM_LA1and10": 1,
"DD_SRAM_LA1and20": 1
},
"margins_of_error": {},
"flags": {
"scope": "condition_indicator",
"record": {
"context": {
"State": "Alabama",
"County20": "Autauga County",
"County24": "Autauga County",
"CensusTract20": "01001020100"
},
"missing": {},
"source_url": "https://ers.usda.gov/media/29395/2025-snap-authorized-retailer-access-map-sram-data.zip?v=60188",
"source_table": "SRAM Driving Distance Data.csv",
"interpretation": "Native historical tract indicators, not current store availability or custom polygon measurements.",
"reference_period": "2025"
},
"source_status": "published",
"designation_id": "SRAM Driving Distance Data.csv",
"source_component": {},
"geometry_available": true
}
}
],
"availability": {
"usda-sram": {
"status": "matches",
"coverage": "United States and source-published territories only; no Canadian equivalents",
"release_metadata": {
"passed": true,
"country": "US",
"records": 252357,
"retrieved_at": "2026-10-30T00:54:10.731609+00:00",
"validated_at": "2026-10-30T01:49:58.098852+00:00",
"coverage_gaps": [],
"missing_values": [
{
"records": 84119,
"row_key": "SRAM General Tract Characteristics Data.csv",
"missing_cells": 3442
}
],
"source_periods": {
"retailer_reference": "2025",
"population_reference": "2020 Census",
"income_poverty_reference": "2020-2024 ACS"
},
"geographic_counts": [
{
"states": [
"01"
],
"records": 252357,
"vintage": "2020"
}
],
"row_storage_bytes": 378784184,
"source_attribution": "USDA ERS — USDA SNAP-authorized Retailer Access Map; https://ers.usda.gov/data-products/food-access-research-atlas/download-the-data; official source snapshots, no endorsement implied.",
"source_geometry_storage": {
"records": 0,
"row_bytes": 0
}
},
"interpretation": "Native published conditions; no current store availability or polygon estimates."
}
},
"next_offset": 1,
"returned_count": 1,
"complete": false,
"snapshot": {
"usda-sram": {
"release_id": 59,
"release": "2025 SRAM parser v1",
"fingerprint": "aecfce5423dc640ed2990ad510853dff"
},
"tiger": {
"release_id": 1,
"release": "2026 + native 2024/2020",
"fingerprint": "0400658a689c0c2b04db479935dae54a"
},
"geography-extended": {
"release_id": 29,
"release": "2026 + native 2024",
"fingerprint": "e63402f6d0af12bc02df1e39a93b9fb8"
},
"designation-boundaries": {
"release_id": 62,
"release": "2010 native tracts + 2020 Island Areas parser v1",
"fingerprint": "c15cd69ac14013bea7024a09f5902f17"
}
},
"metric_definitions": {
"usda-sram": {
"DD_SRAM_LILATracts_1And10": {
"label": "Driving Distance, SNAP-authorized Retailer Access Map, Low income and low access tract measured at 1 mile for urban areas and 10 miles for rural areas",
"unit": "source-defined; see dictionary",
"universe": null,
"source_definition": {
"vintage": "2020",
"dictionary": {
"Field": "DD_SRAM_LILATracts_1And10",
"LongName": "Driving Distance, SNAP-authorized Retailer Access Map, Low income and low access tract measured at 1 mile for urban areas and 10 miles for rural areas",
"Description": "Flag for low-income and low access when considering low accessibilty at 1 and 10 miles, calculated using driving (network-based) distance"
},
"source_url": "https://ers.usda.gov/media/29395/2025-snap-authorized-retailer-access-map-sram-data.zip?v=60188",
"definition_url": "https://ers.usda.gov/data-products/food-access-research-atlas/documentation"
}
},
"DD_SRAM_LILATracts_halfAnd10": {
"label": "Driving Distance, SNAP-authorized Retailer Access Map, Low income and low access tract measured at 1/2 mile for urban areas and 10 miles for rural areas",
"unit": "source-defined; see dictionary",
"universe": null,
"source_definition": {
"vintage": "2020",
"dictionary": {
"Field": "DD_SRAM_LILATracts_halfAnd10",
"LongName": "Driving Distance, SNAP-authorized Retailer Access Map, Low income and low access tract measured at 1/2 mile for urban areas and 10 miles for rural areas",
"Description": "Flag for low-income and low access when considering low accessibilty at 1/2 and 10 miles, calculated using driving (network-based) distance"
},
"source_url": "https://ers.usda.gov/media/29395/2025-snap-authorized-retailer-access-map-sram-data.zip?v=60188",
"definition_url": "https://ers.usda.gov/data-products/food-access-research-atlas/documentation"
}
},
"DD_SRAM_LILATracts_1And20": {
"label": "Driving Distance, SNAP-authorized Retailer Access Map, Low income and low access tract measured at 1 mile for urban areas and 20 miles for rural areas",
"unit": "source-defined; see dictionary",
"universe": null,
"source_definition": {
"vintage": "2020",
"dictionary": {
"Field": "DD_SRAM_LILATracts_1And20",
"LongName": "Driving Distance, SNAP-authorized Retailer Access Map, Low income and low access tract measured at 1 mile for urban areas and 20 miles for rural areas",
"Description": "Flag for low-income and low access when considering low accessibilty at 1 and 20 miles, calculated using driving (network-based) distance"
},
"source_url": "https://ers.usda.gov/media/29395/2025-snap-authorized-retailer-access-map-sram-data.zip?v=60188",
"definition_url": "https://ers.usda.gov/data-products/food-access-research-atlas/documentation"
}
},
"DD_SRAM_LILATracts_Vehicle": {
"label": "Driving Distance, SNAP-authorized Retailer Access Map, Low income and low access tract using vehicle access or low income and low access tract measured at 20 miles",
"unit": "source-defined; see dictionary",
"universe": null,
"source_definition": {
"vintage": "2020",
"dictionary": {
"Field": "DD_SRAM_LILATracts_Vehicle",
"LongName": "Driving Distance, SNAP-authorized Retailer Access Map, Low income and low access tract using vehicle access or low income and low access tract measured at 20 miles",
"Description": "Flag for low-income and low access when considering vehicle access or at 20 miles, calculated using driving (network-based) distance"
},
"source_url": "https://ers.usda.gov/media/29395/2025-snap-authorized-retailer-access-map-sram-data.zip?v=60188",
"definition_url": "https://ers.usda.gov/data-products/food-access-research-atlas/documentation"
}
},
"DD_SRAM_HUNVFlag": {
"label": "Driving Distance, SNAP-authorized Retailer Access Map, Vehicle access, tract with low vehicle access",
"unit": "source-defined; see dictionary",
"universe": null,
"source_definition": {
"vintage": "2020",
"dictionary": {
"Field": "DD_SRAM_HUNVFlag",
"LongName": "Driving Distance, SNAP-authorized Retailer Access Map, Vehicle access, tract with low vehicle access",
"Description": "Flag for tract where >= 100 of households do not have a vehicle, and beyond 1/2 mile from SNAP-authorized foodstore, calculated using driving (network-based) distance"
},
"source_url": "https://ers.usda.gov/media/29395/2025-snap-authorized-retailer-access-map-sram-data.zip?v=60188",
"definition_url": "https://ers.usda.gov/data-products/food-access-research-atlas/documentation"
}
},
"DD_SRAM_LA1and10": {
"label": "Driving Distance, SNAP-authorized Retailer Access Map, Low access tract at 1 mile for urban areas and 10 miles for rural areas",
"unit": "source-defined; see dictionary",
"universe": null,
"source_definition": {
"vintage": "2020",
"dictionary": {
"Field": "DD_SRAM_LA1and10",
"LongName": "Driving Distance, SNAP-authorized Retailer Access Map, Low access tract at 1 mile for urban areas and 10 miles for rural areas",
"Description": "Flag for low access tract at 1 mile for urban areas or 10 miles for rural areas, calculated using driving (network-based) distance"
},
"source_url": "https://ers.usda.gov/media/29395/2025-snap-authorized-retailer-access-map-sram-data.zip?v=60188",
"definition_url": "https://ers.usda.gov/data-products/food-access-research-atlas/documentation"
}
},
"DD_SRAM_LAhalfand10": {
"label": "Driving Distance, SNAP-authorized Retailer Access Map, Low access tract at 1/2 mile for urban areas and 10 miles for rural areas",
"unit": "source-defined; see dictionary",
"universe": null,
"source_definition": {
"vintage": "2020",
"dictionary": {
"Field": "DD_SRAM_LAhalfand10",
"LongName": "Driving Distance, SNAP-authorized Retailer Access Map, Low access tract at 1/2 mile for urban areas and 10 miles for rural areas",
"Description": "Flag for low access tract at 1/2 mile for urban areas or 10 miles for rural areas, calculated using driving (network-based) distance"
},
"source_url": "https://ers.usda.gov/media/29395/2025-snap-authorized-retailer-access-map-sram-data.zip?v=60188",
"definition_url": "https://ers.usda.gov/data-products/food-access-research-atlas/documentation"
}
},
"DD_SRAM_LA1and20": {
"label": "Driving Distance, SNAP-authorized Retailer Access Map, Low access tract at 1 mile for urban areas and 20 miles for rural areas",
"unit": "source-defined; see dictionary",
"universe": null,
"source_definition": {
"vintage": "2020",
"dictionary": {
"Field": "DD_SRAM_LA1and20",
"LongName": "Driving Distance, SNAP-authorized Retailer Access Map, Low access tract at 1 mile for urban areas and 20 miles for rural areas",
"Description": "Flag for low access tract at 1 mile for urban areas or 20 miles for rural areas, calculated using driving (network-based) distance"
},
"source_url": "https://ers.usda.gov/media/29395/2025-snap-authorized-retailer-access-map-sram-data.zip?v=60188",
"definition_url": "https://ers.usda.gov/data-products/food-access-research-atlas/documentation"
}
},
"DD_SRAM_LATracts_half": {
"label": "Driving Distance, SNAP-authorized Retailer Access Map, Low access tract at 1/2 mile",
"unit": "source-defined; see dictionary",
"universe": null,
"source_definition": {
"vintage": "2020",
"dictionary": {
"Field": "DD_SRAM_LATracts_half",
"LongName": "Driving Distance, SNAP-authorized Retailer Access Map, Low access tract at 1/2 mile",
"Description": "Flag for low access tract when considering 1/2 mile distance, calculated using driving (network-based) distance"
},
"source_url": "https://ers.usda.gov/media/29395/2025-snap-authorized-retailer-access-map-sram-data.zip?v=60188",
"definition_url": "https://ers.usda.gov/data-products/food-access-research-atlas/documentation"
}
},
"DD_SRAM_LATracts1": {
"label": "Driving Distance, SNAP-authorized Retailer Access Map, Low access tract at 1 mile",
"unit": "source-defined; see dictionary",
"universe": null,
"source_definition": {
"vintage": "2020",
"dictionary": {
"Field": "DD_SRAM_LATracts1",
"LongName": "Driving Distance, SNAP-authorized Retailer Access Map, Low access tract at 1 mile",
"Description": "Flag for low access tract when considering 1 mile distance, calculated using driving (network-based) distance"
},
"source_url": "https://ers.usda.gov/media/29395/2025-snap-authorized-retailer-access-map-sram-data.zip?v=60188",
"definition_url": "https://ers.usda.gov/data-products/food-access-research-atlas/documentation"
}
},
"DD_SRAM_LATracts10": {
"label": "Driving Distance, SNAP-authorized Retailer Access Map, Low access tract at 10 miles",
"unit": "source-defined; see dictionary",
"universe": null,
"source_definition": {
"vintage": "2020",
"dictionary": {
"Field": "DD_SRAM_LATracts10",
"LongName": "Driving Distance, SNAP-authorized Retailer Access Map, Low access tract at 10 miles",
"Description": "Flag for low access tract when considering 10 mile distance, calculated using driving (network-based) distance"
},
"source_url": "https://ers.usda.gov/media/29395/2025-snap-authorized-retailer-access-map-sram-data.zip?v=60188",
"definition_url": "https://ers.usda.gov/data-products/food-access-research-atlas/documentation"
}
},
"DD_SRAM_LATracts20": {
"label": "Driving Distance, SNAP-authorized Retailer Access Map, Low access tract at 20 miles",
"unit": "source-defined; see dictionary",
"universe": null,
"source_definition": {
"vintage": "2020",
"dictionary": {
"Field": "DD_SRAM_LATracts20",
"LongName": "Driving Distance, SNAP-authorized Retailer Access Map, Low access tract at 20 miles",
"Description": "Flag for low access tract when considering 20 mile distance, calculated using driving (network-based) distance"
},
"source_url": "https://ers.usda.gov/media/29395/2025-snap-authorized-retailer-access-map-sram-data.zip?v=60188",
"definition_url": "https://ers.usda.gov/data-products/food-access-research-atlas/documentation"
}
}
}
},
"coverage_limitations": {
"usda-sram": []
},
"native_area_contexts": {},
"commuting_flows": []
}Captured 2026-11-03. Excerpt omits pagination credentials and may shorten nested records. Download verified source responses.
Coverage and interpretation
Coverage is limited to published source geographies and releases. Missing, suppressed and unavailable observations must not be treated as zero.
The active release shown here is a catalog snapshot. Check the live catalog and response provenance for current readiness. The underlying public source and Geoamcan access terms are separate; consult the source’s licensing and attribution requirements.
Source and methodology
Source: USDA ERS. Geoamcan is an independent API provider, with no agency affiliation or endorsement. Read our data methodology for source handling, geographic joins and update practices.
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