Map view properties

Projection

The widget properties affected by this configuration are Center, ExtentLimit, CurrentExtent, Click, SelectedFeature geometry, and Location. Some of the most used projections are:

• EPSG:4326: WGS84 - Also known as LongLat. Used by the GPS satellite navigation system and for NATO military geodetic surveying.

• EPSG:3857: Mercator - Projected coordinate system used for rendering maps in Google Maps, OpenStreetMap, etc.

• EPSG:27700 BNG - British National Grid, United Kingdom Ordnance Survey.

Zoom

Map view zoom level.

This property allows to get or set the current map view zoom level.

Center

Map view center coordinates (X,Y).

This property allows to get or set the current map view center. The coordinates projection is taken from the Projection widget property.
By default the projection used is ESPG:4326 which corresponds to coordinates expressed as Longitude,Latitude.

CurrentExtent

Map view current extent (minX,minY,maxX,maxY).

Gives access to the current map view extent. This value can be used to query for assets that are currently visible. The coordinates projection is taken from the Projection widget property. By default, the projection used is ESPG:4326 which corresponds to coordinates expressed as minLongitude, minLatitude, maxLongitude, maxLatitude.

MinZoom

Map view minimum zoom level constrain.

This value constrains the zoom level so it cannot be lower that this number (either by interacting with the map or by setting the Zoom widget property).

MaxZoom

Map view maximum zoom level constrain.

This value constrains the zoom level so it cannot be higger that this number (either by interacting with the map or by setting the Zoom widget property).

ExtentLimit

Map view extent limit (minX,minY,maxX,maxY).

The extent that constrains the view, in other words, nothing outside of this extent can be visible on the map.

The coordinates projection is taken from the Projection widget property. By default, the projection used is ESPG:4326 which corresponds to coordinates expressed as minLongitude, minLatitude, maxLongitude, maxLatitude.