Glossary

Link GeoJSON Back to Top

Terraformer uses the GeoJSON specification as a guide on how to format all representation of geographical data.

A coordinate is the building block for the rest of the GeoJSON specification. It is represented by an array of x, y integers. The ordering of x and y are important, this means that when representing latitude and longitiude the order is [longitude, latitude].

[-122.680, 45.528]

GeoJSON Coordinate

Link Coordinates Back to Top

An array of Coordinate objects that are used to define a line or polygon.

[
  [-122.680, 45.58],
  [-123.230, 45.62],
  [-122.80, 45.22]
]

GeoJSON Coordinate

Link Bbox Back to Top

A GeoJSON bounding box is usually a 4-item array representing the rectangle that will contain the GeoJSON object.

[-122.70, 45.51, -122.64, 45.53]

GeoJSON BBox

Link Geometry Back to Top

“GeoJSON Geometry” refers to any of the single geometry objects from the geoJSON specification like Point, MultiPoint, LineString, MultiLineString, Polygon, or MultiPolygon.

GeoJSON Geometry

Link Point Back to Top

An object representing a single point.

{
  "type": "Point",
  "coordinates": [-105.01621, 39.57422]
}

GeoJSON Point

Link MultiPoint Back to Top

An object representing multiple points as a single coordinate array.

{
  "type": "MultiPoint",
  "coordinates": [ [-105.01, 39.57], [-80.66, 35.05] ]
}

GeoJSON MultiPoint

Link LineString Back to Top

A series of coordinates that form a line.

{
  "type": "LineString",
  "coordinates": [
    [-101.5, 39.662],
    [-101.75, 39.2415],
    [-101.64, 39.2415],
  ]
}

GeoJSON LineString

Link MultiLineString Back to Top

An object that represents multiple linestrings in a single object.

{
  "type": "MultiLineString",
  "coordinates": [
    [
      [-101.5, 39.662],
      [-101.75, 39.2415],
      [-101.23, 39.2415],
      [-101.749, 39.7984],
      [-101.5, 39.011]
    ],[
      [-99.23, 38.6605],
      [-99.56, 38.727],
      [-99.25, 38.018]
    ],[
      [-98.499, 38.913],
      [-98.499, 38.913],
      [-98.38, 38.15],
      [-97.5, 38.629]
    ]
  ]
}

GeoJSON MultiLineString

Link Polygon Back to Top

An array of coordinates defining a polygon.

{
  "type": "Polygon",
  "coordinates": [
    [ [41.83, 71.01], [56.95, 33.75], [21.79, 36.56], [41.83, 71.01] ]
  ]
}

GeoJSON Polygon

Link MultiPolygon Back to Top

An object that represents multiple polygons in a single object.

{
  "type": "MultiPolygon",
  "coordinates": [
    [
      [ [102.0, 2.0], [103.0, 2.0], [103.0, 3.0], [102.0, 3.0], [102.0, 2.0] ]
    ],
    [
      [ [100.0, 0.0], [101.0, 0.0], [101.0, 1.0], [100.0, 1.0], [100.0, 0.0] ]
    ]
  ]
}

GeoJSON MultiPolygon

Link Feature Back to Top

GeoJSON Features combine a Geometry object with a unique identifier and set of metadata.

{
  "type": "Feature",
  "id": "stadium",
  "geometry": {
    "type": "Point",
    "coordinates": [-104.99404, 39.75621]
  },
  "properties": {
    "name": "Coors Field",
    "amenity": "Baseball Stadium",
    "popupContent": "This is where the Rockies play!"
  }
}

Feature

Link FeatureCollection Back to Top

Contains multiple Features objects in a single object.

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "geometry": {
        "type": "Point",
        "coordinates": [-80.83775386582222, 35.24980190252168]
      },
      "properties": {
        "name": "DOUBLE OAKS CENTER",
        "address": "1326 WOODWARD AV"
      }
    },
    {
      "type": "Feature",
      "geometry": {
        "type": "Point",
        "coordinates": [-80.83827000459532, 35.25674709224663]
      },
      "properties": {
        "name": "DOUBLE OAKS NEIGHBORHOOD PARK",
        "address": "2605  DOUBLE OAKS RD"
      }
    }
  ]
}

FeatureCollection

Link GeometryCollection Back to Top

Contains multiple Geometry objects in a single object.

{
  "type": "GeometryCollection",
  "geometries": [{
    "type": "Polygon",
    "coordinates": [
      [ [41.83, 71.01], [56.95, 33.75], [21.79, 36.56], [41.83, 71.01] ]
    ]
    },{
      "type": "MultiPoint",
      "coordinates": [ [100, 0], [45, -122] ]
    }
  ]
}