A layer is a collection of information. It contains specific elements of a gis in a specific presentation method (e.g raster or vector layer). Layers can be edited separately in order to create individual toppics for a map.

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Missing Raster/Vector Layers after converting KMZ using KMLToLayer tool of ArcGIS Desktop?

I am trying to write a tool that will let users upload a KML/KMZ file and then be able to view it in a client application (something like an esri js api or Flex app). I am ok with storing the data in ...
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How to resolve error “Handle bad layers” in QGIS?

I'm new to QGIS and have been seeing what it can do for me – seems good. I imported shape file data from a UK Ordnance Survey data file and saved the file in a new folder. It was very good, doing all ...
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How to Obtain the feature attributes from feature collection

I am able to obtain the features of the layer which is selected by the user in the Layers table and then intersected by a user defined polygon, using e.features. I was able to obtain the attribute ...