openglobus

Class: GlobusTerrain

GlobusTerrain

Class that loads segment elevation data, converts it to the array and passes it to the planet segment.

new GlobusTerrain(name, options, gridSizeByZoom)

og/terrain/GlobusTerrain.js, line 52
Name Type Default Description
name string "" optional Terrain provider name.
options Object optional Provider options:
Name Type Default Description
minZoom number 3 optional Minimal visible zoom index when terrain handler works.
minZoom number 14 optional Maximal visible zoom index when terrain handler works.
url string "//openglobus.org/heights/srtm3/{z}/{y}/{x}.ddm" optional Terrain source path url template. Default is openglobus ddm elevation file.
gridSizeByZoom Array.<number> optional Array of segment triangulation grid sizes where array index agreed to the segment zoom index.
plainGridSize number 32 optional Elevation grid size. Default is 32x32. Must be power of two.
responseType string "arraybuffer" optional Ajax responce type.
MAX_LOADING_TILES number optional Maximum at one time loading tiles.
gridSizeByZoom Array.<number> optional Array of values, where each value corresponds to the size of a tile(or segment) on the globe. Each value must be power of two.
Fires:
  • - Triggered when current elevation tile has loaded but before rendereing.
  • - Triggered when all elevation tiles have loaded or loading has stopped.

Extends

  • EmptyTerrain

Members

eventsEvents

Events handler.

gridSizeByZoomArray.<number>

Array of segment triangulation grid sizes where array index agreed to the segment zoom index.

maxZoomnumber

Maximal visible zoom index when terrain handler works.

minZoomnumber

Minimal visible zoom index when terrain handler works.

namestring

Provider name.

plainGridSizenumber

Elevation tile grid size.

urlstring

Terrain source path url template.

Methods

protected_applyElevationsData(segment, data)

og/terrain/GlobusTerrain.js, line 453
Name Type Description
segment Segment -
data * -

abstract_createHeights(data){Array.<number>}

og/terrain/GlobusTerrain.js, line 444
Converts loaded data to segment elevation data type(columr major elevation data array in meters)
Name Type Description
data * Loaded elevation data.
Returns:
Type Description
Array.<number> -

abstract,protected_createUrl(segment){string}

og/terrain/GlobusTerrain.js, line 408
Creates query url.
Name Type Description
segment Segment -
Returns:
Type Description
string -

protected_getHTTPRequestString(segment){string}

og/terrain/GlobusTerrain.js, line 422
Returns actual url query string.
Name Type Description
segment Segment Segment that loads image data.
Returns:
Type Description
string - Url string.

abortLoading()

og/terrain/GlobusTerrain.js, line 319
Stop loading.

abstractloadTerrain(segment, forceLoading)

og/terrain/GlobusTerrain.js, line 357
Starts to load segment data.
Name Type Description
segment Segment Segment that wants a terrain data.
forceLoading boolean

setName(name)

og/terrain/GlobusTerrain.js, line 339
Sets provider name.
Name Type Description
name string Name.

setUrl(url)

og/terrain/GlobusTerrain.js, line 330
Sets terrain data url template.
Name Type Description
url string Url template.
Example

Default openglobus url template:

:
"http://earth3.openglobus.org/{z}/{y}/{x}.ddm"

setUrlRewriteCallback(ur)

og/terrain/GlobusTerrain.js, line 433
Sets url rewrite callback, used for custom url rewriting for every tile laoding.
Name Type Description
ur GlobusTerrain~_urlRewriteCallback The callback that returns tile custom created url.