Search results
Results from the WOW.Com Content Network
Leaflet supports Web Map Service (WMS) layers, GeoJSON layers, Vector layers and Tile layers natively. Many other types of layers are supported via plugins.. Like other web map libraries, the basic display model implemented by Leaflet is one basemap, plus zero or more translucent overlays, with zero or more vector objects displayed on top.
In object-oriented programming, the iterator pattern is a design pattern in which an iterator is used to traverse a container and access the container's elements. The iterator pattern decouples algorithms from containers; in some cases, algorithms are necessarily container-specific and thus cannot be decoupled.
This is designed for transit routes, but is easily applicable for creating maps of roads, rivers, and other linear objects. For maps of shapes (neighborhoods, parks, historic districts, campuses, and most other present-day sites), see Wikipedia:Creating shape maps from OpenStreetMap data. This tutorial requires basic knowledge of:
8. Create a station point: Select the "Station points" layer and click on the Create circles, ellipses, and arcs (F5) button. Left-click in the work area and hold down the CTRL button to create a perfect circle. Resize the circle 9. Resize the circle: Click the Select and transform objects (F1) button. Ensure the width and height of the circle ...
GeoJSON [1] is an open standard format designed for representing simple geographical features, along with their non-spatial attributes.It is based on the JSON format.. The features include points (therefore addresses and locations), line strings (therefore streets, highways and boundaries), polygons (countries, provinces, tracts of land), and multi-part collections of these types.
GML defines features distinct from geometry objects. A feature is an application object that represents a physical entity, e.g. a building, a river, or a person. A feature may or may not have geometric aspects. A geometry object defines a location or region instead of a physical entity, and hence is different from a feature.
Sometimes objects represent more abstract entities, like an object that represents an open file, or an object that provides the service of translating measurements from U.S. customary to metric. Objects can contain other objects in their instance variables; this is known as object composition. For example, an object in the Employee class might ...
The presenter then retrieves data from the view through methods defined by the view interface. Finally, the presenter operates on the model and updates the view with the results of the operation. Other versions of model–view–presenter allow some latitude with respect to which class handles a particular interaction, event, or command.