How to define the spatial data?

[inbo]

How to define the spatial data?

[peterdesmet]

The current expression is just two points. It's better to express a bounding box or polygon representing the bounding box. After some discussion, @coreation noticed DCAT allows to express this information as geojson, which is widely recognized. I'll figure out the mapping.

[peterdesmet]

From the polygon example:

{
  "type": "Polygon",
  "coordinates": [
    [ [minLong, minLat], [minLong, maxLat], [maxLong, maxLat], [maxLong, minLat], [minLong, minLat] ]
  ]
}

Example

• minLat:10
• minLong: -25
• maxLat: 60
• maxLong: 10

{
  "type": "Polygon",
  "coordinates": [
    [ [-25, 10], [-25, 60], [10, 60], [10, 10], [-25, 10] ]
  ]
}

You can of course express this on one line:

{ "type": "Polygon", "coordinates": [ [ [-25, 10], [-25, 60], [10, 60], [10, 10], [-25, 10] ] ] }

You can test the output in Geojsonlint.

[peterdesmet]

For the catalog:spatial, we propose to also use geojson, but this time as a point:

{
    "type": "Point",
    "coordinates": [
        longitude,
        latitude
    ]
}

{ "type": "Point", "coordinates": [ 4.334187, 50.842133 ] }