---
title: Static heat sources
description: The persistent-anomaly mask Deepfire uses to suppress false positives (flares, solar farms, industrial sites and volcanoes) as a queryable collection.
---

`deepfire:static-heat-sources` — known persistent heat and reflection sources that
trigger satellite fire detections but are not wildfires. Geometry: **Polygon**
(EPSG:4326). Feature IDs: `static-heat-sources.<id>`.

## Attributes

| Property    | Type             | Notes                                                                 |
| ----------- | ---------------- | --------------------------------------------------------------------- |
| `id`        | number           | Feature key (surfaced as `static-heat-sources.<id>`)                  |
| `global_id` | string           | NOAA's identifier. Not unique: large polygons are subdivided on load  |
| `type`      | string           | `Oil/gas` \| `Reflective surface` \| `Thermal anomaly` \| `Volcano`   |
| `source`    | string, nullable | Where NOAA identified the anomaly (e.g. a satellite product)          |
| `method`    | string, nullable | How the polygon was derived                                           |
| `remarks`   | string, nullable | Free-text notes from NOAA (site name, operator)                       |
| `year`      | number, nullable | Year the anomaly was cataloged                                       |

## Examples

Everything in a bounding box (Texas):

```bash
curl -sG -H "Authorization: Bearer $TOKEN" \
  "https://api.deepfire.co/ogc/features/v1/collections/deepfire:static-heat-sources/items" \
  --data-urlencode "bbox=-107,26,-93,37" \
  --data-urlencode "limit=1000" \
  --data-urlencode "f=application/geo+json"
```

Only gas flares:

```bash
curl -sG -H "Authorization: Bearer $TOKEN" \
  "https://api.deepfire.co/ogc/features/v1/collections/deepfire:static-heat-sources/items" \
  --data-urlencode "filter-lang=cql2-text" \
  --data-urlencode "filter=type = 'Oil/gas'" \
  --data-urlencode "limit=1000" \
  --data-urlencode "f=application/geo+json"
```

Is this point on a known static source? This one is on Kīlauea; an empty `features`
array means no:

```bash
curl -sG -H "Authorization: Bearer $TOKEN" \
  "https://api.deepfire.co/ogc/features/v1/collections/deepfire:static-heat-sources/items" \
  --data-urlencode "filter-lang=cql2-text" \
  --data-urlencode "filter=S_INTERSECTS(geom, POINT(-155.28 19.41))" \
  --data-urlencode "f=application/geo+json"
```

## Source

This dataset combines several sources, including NOAA's Global Persistent Anomalies Mask.

Full parameter reference:
[Get static heat sources](/reference/static-heat-sources/items-deepfire-static-heat-sources).