February 2, 2012
The Export area allows you to export any area that has been defined by a user-generated mapped layer (e.g., Add to Map | Area or Import | Areas). You cannot export layers due to the licensing restrictions (which we are working on), but you can view all layers in an external application using WMS.
Export My Area
The user defined area, generated via digitising a polygon on the map and shown here in red, can be exported from the Spatial Portal in three different standard formats (Shapefile, KML, WKT).
Export Area Menu Option
From the menu option, select ‘Export’, and then ‘Areas’.
If you have a one or more predefined active areas mapped, then these will be available as an option to export, e.g., ‘My Area’ or ‘Barossa’.
Select an Export area option
Multiple areas (mapped layers) can be combined into a single export file using the ‘All area layers’ option. In this case, both the ‘My Area’ and ‘Barossa’ layers will be exported as a single file.
Select to export all predefined area layers
Press the ‘Next’ button.
Select an export area format option
Select one of the three area export formats:
Export Area Shapefile
Pressing the ‘Next’ button produces the Shapefile zip.
Export Shapefile zip file
Shapefile Zip Contents
The Shapefile is an common open standard developed by ESRI that can be imported into many GIS products.
Shapefile loaded into uDig
Export Keyhole Markup Language (KML)
Export Area KML
Pressing the ‘Next’ button produces a zip file containing the KML file.
Export KML zip file
The KML file contained within the zip file.
An example KML file
The KML file is then available for loading into Google Earth or Google Maps or other software that accepts KML.
KML loaded into Google Earth
Export Well Known Text (WKT)
Export Area Well Known Text (WKT)
Pressing the ‘Next’ button produces a zip file containing the WKT text file.
Export WKT zip file
The WKT text file contained within the zip file.
Contents of the WKT file
The WKT is a very simple and readable text format that is also supported by a range of products. Two useful things about WKT are that the coordinates can be directly edited, and because it is simple text, it is likely to be compatible i.e. (read) well into the future.