Class ProjectionAbstract

constructor

• new Projection(): Projection

  Returns Projection

StaticCUSTOM_WKT_AND_NUM

StaticCUSTOM_WKT_NUM

StaticPROJECTION_NAMES

StaticPROJECTIONS

StaticaddProjection

• addProjection(projection: TypeProjection): Promise<void>

  Fetches definitions for unsupported projections and adds them.

  Parameters

  • projection: TypeProjection

    Object containing wkid and possibly latestWkid from service metadata.

  Returns Promise<void>

StaticgetProjectionFromObj

• getProjectionFromObj(
      projectionObj: TypeProjection | undefined,
  ): Projection | undefined

  Wrapper around OpenLayers get function that fetches a Projection object for the code specified.

  Parameters

  • projectionObj: TypeProjection | undefined

    A projection object with properties such as latestWkid, wkid, or wkt.

  Returns Projection | undefined

  — Projection object, or undefined if not in list.

StaticgetProjectionFromString

• getProjectionFromString(projection: ProjectionLike): Projection

  Wrapper around OpenLayers get function that fetches a Projection object for the code specified.

  Parameters

  • projection: ProjectionLike

    A code string which is a combination of authority and identifier such as "EPSG:4326".

  Returns Projection

  Projection object, or undefined if not found.

StaticgetProjectionFromWKT

• getProjectionFromWKT(customWKT: string): Projection

  Wrapper around OpenLayers get function that fetches a Projection object for the code specified.

  Parameters

  • customWKT: string

    A code string which is a combination of authority and identifier such as "EPSG:4326".

  Returns Projection

  Projection object, or undefined if not in list.

StaticgetProjectionLonLat

• getProjectionLonLat(): Projection

  Gets the projection representing a LonLat projection.

  Returns Projection

  Projection object representing LonLat.

StaticgetResolution

• getResolution(projection: string, center: Coordinate): number

  Get map point resolution

  Parameters

  • projection: string

    The projection code

  • center: Coordinate

    Map center

  Returns number

  The point resolution for map center

StaticreadExtentCarefully

• readExtentCarefully(projection: string, extent: Extent): Extent

  Reads an extent and verifies if it might be reversed (ymin,xmin,ymax,ymin) and when so puts it back in order (xmin,ymin,xmax,ymax).

  Parameters

  • projection: string

    The projection the extent is in

  • extent: Extent

    The extent to check

  Returns Extent

  The extent in order (xmin,ymin,xmax,ymax).

Statictransform

• transform(
      coordinate: Coordinate,
      inProjection: Projection,
      outProjection: Projection,
  ): Coordinate

  Wrapper around OpenLayers function to transforms a coordinate from one projection to another.

  Parameters

  • coordinate: Coordinate

    Longitude/latitude coordinate

  • inProjection: Projection

    Actual projection of the coordinate

  • outProjection: Projection

    Desired projection of the coordinate

  Returns Coordinate

  Coordinate as projected

StatictransformAndDensifyExtent

• transformAndDensifyExtent(
      extent: Extent,
      source: Projection,
      destination: Projection,
      stops?: number,
  ): Coordinate[]

  Transforms an extent from source projection to destination projection. This returns a new extent (and does not modify the original).

  Parameters

  • extent: Extent

    The extent to transform.

  • source: Projection

    Source projection-like.

  • destination: Projection

    Destination projection-like.

  • stops: number = 25

    Optional number of stops per side used for the transform. The default value is 25.

  Returns Coordinate[]

  The densified extent transformed in the destination projection.

StatictransformCoordinates

• transformCoordinates(
      coordinates:
          | Coordinate
          | Coordinate[]
          | Coordinate[][]
          | Coordinate[][][]
          | undefined,
      startProjection: string,
      endProjection: string,
  ): Coordinate | Coordinate[] | Coordinate[][] | Coordinate[][][] | undefined

  Transform coordinates between two projections

  Parameters

  • coordinates: Coordinate | Coordinate[] | Coordinate[][] | Coordinate[][][] | undefined

    The coordinates to transform

  • startProjection: string

    The current projection of the coordinates. Note: the value should include 'EPSG:' then the projection number.

  • endProjection: string

    The transformed projection of the coordinates. Note: the value should include 'EPSG:' then the projection number.

  Returns Coordinate | Coordinate[] | Coordinate[][] | Coordinate[][][] | undefined

  The transformed coordinates

StatictransformExtentFromObj

• transformExtentFromObj(
      extent: Extent,
      projection: TypeProjection | undefined,
      destination: Projection,
      stops?: number,
  ): Extent

  Transforms an extent from source projection to destination projection. This returns a new extent (and does not modify the original).

  Parameters

  • extent: Extent

    The extent to transform.

  • projection: TypeProjection | undefined

    An object containing a wkid or wkt property.

  • destination: Projection

    Destination projection-like.

  • Optionalstops: number

    Optional number of stops per side used for the transform. By default only the corners are used.

  Returns Extent

  The new extent transformed in the destination projection.

StatictransformExtentFromProj

• transformExtentFromProj(
      extent: Extent,
      source: Projection,
      destination: Projection,
      stops?: number,
  ): Extent

  Transforms an extent from source projection to destination projection. This returns a new extent (and does not modify the original).

  Parameters

  • extent: Extent

    The extent to transform.

  • source: Projection

    Source projection-like.

  • destination: Projection

    Destination projection-like.

  • Optionalstops: number

    Optional number of stops per side used for the transform. By default only the corners are used.

  Returns Extent

  The new extent transformed in the destination projection.

StatictransformExtentFromWKID

• transformExtentFromWKID(
      extent: Extent,
      wkid: number,
      destination: Projection,
      stops?: number,
  ): Extent

  Transforms an extent from source projection to destination projection. This returns a new extent (and does not modify the original).

  Parameters

  • extent: Extent

    The extent to transform.

  • wkid: number

    An EPSG id number.

  • destination: Projection

    Destination projection-like.

  • Optionalstops: number

    Optional number of stops per side used for the transform. By default only the corners are used.

  Returns Extent

  The new extent transformed in the destination projection.

StatictransformExtentFromWKT

• transformExtentFromWKT(
      extent: Extent,
      customWKT: string,
      destination: Projection,
      stops?: number,
  ): Extent

  Transforms an extent from source projection to destination projection. This returns a new extent (and does not modify the original).

  Parameters

  • extent: Extent

    The extent to transform.

  • customWKT: string

    A custom WKT projection.

  • destination: Projection

    Destination projection-like.

  • Optionalstops: number

    Optional number of stops per side used for the transform. By default only the corners are used.

  Returns Extent

  The new extent transformed in the destination projection.

StatictransformFromLonLat

• transformFromLonLat(coordinate: Coordinate, projection: Projection): Coordinate

  Wrapper around OpenLayers function to transforms a coordinate from longitude/latitude.

  Parameters

  • coordinate: Coordinate

    Longitude/latitude coordinate

  • projection: Projection

    Projection to project the coordinate

  Returns Coordinate

  Coordinate as projected

StatictransformPoints

• transformPoints(
      points: Coordinate[],
      fromProj: string,
      toProj: string,
  ): number[][]

  Converts points from one projection to another using proj4

  Parameters

  • points: Coordinate[]

    Array of passed in points to convert

  • fromProj: string

    Projection to be converted from

  • toProj: string

    Projection to be converted to

  Returns number[][]

StatictransformToLonLat

• transformToLonLat(coordinate: Coordinate, projection: Projection): Coordinate

  Wrapper around OpenLayers function to transforms a coordinate to longitude/latitude.

  Parameters

  • coordinate: Coordinate

    Projected coordinate

  • projection: Projection

    Projection of the coordinate

  Returns Coordinate

  Coordinate as longitude and latitude, i.e. an array with longitude as 1st and latitude as 2nd element.

StatictransformToUTMNorthingEasting

• transformToUTMNorthingEasting(
      coordinate: Coordinate,
      utmZone: string,
  ): Coordinate

  Function for converting a coordinate to a UTM Northing / Easting

  Parameters

  • coordinate: Coordinate

    The coordinate to be converted

  • utmZone: string

    The utm zone the return coordinates will be in

  Returns Coordinate

  The returned coordinates in UTM Northing / Easting