Merge pull request #1068 from radiantearth/gsd-gt0

GSD > 0
radiantearth · Mar 30, 2021 · b2b1d7c · b2b1d7c
2 parents 10c8543 + 3ae8941
commit b2b1d7c
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -10,6 +10,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ### Changed
 
+- `gsd` must be greater than 0.
+
 ### Removed
 
 ### Fixed

diff --git a/item-spec/common-metadata.md b/item-spec/common-metadata.md
@@ -135,7 +135,7 @@ with domain-specific extensions that describe the actual data, such as the `eo`
 | instruments   | \[string] | Name of instrument or sensor used (e.g., MODIS, ASTER, OLI, Canon F-1). |
 | constellation | string    | Name of the constellation to which the platform belongs. |
 | mission       | string    | Name of the mission for which data is collected. |
-| gsd        | number    | Ground Sample Distance at the sensor, in meters (m). |
+| gsd           | number    | Ground Sample Distance at the sensor, in meters (m), must be greater than 0. |
 
 ### Additional Field Information
 

diff --git a/item-spec/json-schema/instrument.json b/item-spec/json-schema/instrument.json
@@ -25,7 +25,8 @@
     },
     "gsd": {
       "title": "Ground Sample Distance",
-      "type": "number"
+      "type": "number",
+      "exclusiveMinimum": 0
     }
   }
 }