Endpoint · extractionPOSTapi.geoprimitives.dev /v1/geometry/area
Measure how much ground a polygon covers, in square metres and square kilometres, with holes subtracted and every part of a MultiPolygon summed.
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Measure how much ground a polygon covers, in square metres and square kilometres, with holes subtracted and every part of a MultiPolygon summed. Use it after POST /v1/geometry/intersect to size an overlap, or on a boundary you already hold. Points and lines contribute zero rather than an error, so a mixed collection is safe to send. Not turf's area, which applies the spherical-excess formula to geodetic latitudes on a 6371008.8 m sphere and comes out 0.45% high at the equator and 0.85% low at 80 deg latitude. This maps latitude to authalic latitude on the WGS 84 authalic sphere first, landing within 5e-3% of GeographicLib's geodesic area on parcel-scale rings and converging to 1e-6% as ring edges are densified. Ring edges are treated as straight in longitude/latitude, per RFC 7946 and turf; a geodesic-edge area differs on long slanted edges, by 1.9% on a 1.7-degree triangle. Winding order is ignored: ring 0 is the exterior and the rest are holes. Input is EPSG:4326 only. Limits: 100000 positions across the whole document, 1 MiB request body.Overview
Grade?
UNRATED
0 of 30 paid calls toward a letter
Price
$0.01 per call
Paid calls
none yet
delivery unknown until someone pays
More info
Seller?
URL
https://api.geoprimitives.dev/v1/geometry/area
Seen
first 35 days ago · last 14 days ago
51 free handshakes
Payment
Pays through
— never asked
Offered on?
— never asked
Listed on?
Base
Score, from free handshakes onlyweights 2026.09.6
UN
RATED
RATED
0.000 liveness verified, no letter
To a letter · 30 paid calls
0 of 30
Held down by liveness · gap to 1.000 is 1.000: 0.250 uncertain ? + 0.750 short ? · 0.450 to D
| Component | Weight | Measured | Lower bound ? | Adds | Short ? | Uncertain ? | |
|---|---|---|---|---|---|---|---|
| livenesscosts the most it answered at all |
0.75 | 0.00 | 0.000 | 0.000 | −0.750 | 0 | |
| latency p95 it answered as fast as its class |
0.25 | 1.00 | 0.000 | 0.000 | 0 | −0.250 | |
| Composite | 1.00 | 0.000 | gap to 1.000 = 1.000 · 0.750 short · 0.250 uncertain | 0.000 | −0.750 | −0.250 |
Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check; price stability · nothing to score
The multiplication, written out
0.750 × 0.000 liveness
+ 0.250 × 0.000 latency p95
= 0.000 → UNRATED: 51 of 30 paid calls weights 2026.09.6 · 51 samples · seed cap_01M1A59RXC9X3R0MS6MW901YM1|2026-08-27T02:54:20.335Z|2026.09.6
Verify it yourself
npx teppi-check https://api.geoprimitives.dev/v1/geometry/areacurl -s https://api.teppi.xyz/v1/trust/cap_01M1A59RXC9X3R0MS6MW901YM1