GNIS Populated Place Lookup by Name: State and County (USGS)

usgsnmcarto/gnis-place-lookup

Looks up a United States place name in the U.S. Geological Survey Geographic Names Information System (GNIS) gazetteer's Populated Places layer and returns every match with its state abbreviation and county, up to a limit you set (default 50, at most 200). Useful for telling apart towns that share a name across states. Search is by name only, as GNIS spells it; coordinates are not returned. U.S. Geological Survey data, passed through unmodified and served by Omnial; not an official USGS product.

activeper callv1

Price

$0.0026 per call

You pay the price shown. If a call turns out to cost more than its quote, you pay the actual price, capped at twice the quote. No monthly minimum. Top-ups start at $5.

Data source

U.S. Geological Survey

Source: U.S. Geological Survey, The National Map: Geographic Names Information System. USGS-authored data are in the U.S. public domain per usgs.gov/information-policies-and-instructions/copyrights-and-credits; credit is requested. Served by Eden Engine; not an official USGS product.

Use it

Five steps: search, inspect, learn, run, settle. No per-tool setup; your agent reaches this tool through the meta-tools it already has.

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agent

// 1. search: find the tool
omnial_search({ query: "what you need" })

// 2. inspect: price and input schema
omnial_inspect({ tool: "usgsnmcarto/gnis-place-lookup" })

// 3. learn: read the usage guide at runtime
omnial_learn({ tool: "usgsnmcarto/gnis-place-lookup" })

// 4. run: price the exact call first, then run it
omnial_execute({ tool: "usgsnmcarto/gnis-place-lookup", input: { /* see input_schema */ }, dry_run: true })
omnial_execute({ tool: "usgsnmcarto/gnis-place-lookup", input: { /* ... */ } })

// 5. settle: the call is charged when it finishes, nothing to do

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Pricing

Every charge this tool can incur.

Charge	Price
Per call	$0.0026

Updated: Oct 20, 2026

Input and output schemas

Input schema

input_schema.json

{
  "type": "object",
  "required": [
    "name"
  ],
  "properties": {
    "name": {
      "type": "string",
      "pattern": "^[A-Za-z0-9][A-Za-z0-9 .-]{0,99}$",
      "maxLength": 100,
      "minLength": 1,
      "description": "The place name as GNIS writes it, for example Denver or Winston-Salem. Letters, digits, spaces, full stops and hyphens only: a name containing an apostrophe cannot be searched."
    },
    "limit": {
      "type": "integer",
      "default": 50,
      "maximum": 200,
      "minimum": 1,
      "description": "The most matches to return. When more exist than this, the response sets exceededTransferLimit to true. Defaults to 50."
    }
  },
  "additionalProperties": false
}

Output schema

output_schema.json

{
  "type": "object",
  "required": [
    "features"
  ],
  "properties": {
    "fields": {
      "type": "array",
      "items": {
        "type": "object",
        "additionalProperties": true
      },
      "description": "The name, type and length of each returned attribute."
    },
    "features": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "attributes"
        ],
        "properties": {
          "attributes": {
            "type": "object",
            "properties": {
              "gaz_name": {
                "type": "string",
                "description": "The place name."
              },
              "county_name": {
                "type": "string",
                "description": "County name."
              },
              "state_alpha": {
                "type": "string",
                "description": "State or territory abbreviation."
              }
            },
            "additionalProperties": true
          }
        },
        "additionalProperties": true
      },
      "description": "One entry per matching populated place."
    },
    "fieldAliases": {
      "type": "object",
      "additionalProperties": true
    },
    "displayFieldName": {
      "type": "string",
      "description": "The layer's display field."
    },
    "exceededTransferLimit": {
      "type": "boolean",
      "description": "True when more places match than the limit let through; raise the limit (at most 200) to see more."
    }
  },
  "description": "The ArcGIS query response: the matching rows under `features`, each with its values under `attributes`.",
  "additionalProperties": true
}