Category: GIS
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Extracting legend symbology from ArcGIS Server Map Services
Our user experience team were looking to do a refresh on our symbology that we use for our Map Services that we host on ArcGIS Server. They wanted to see all symbols used in the map service so they could pass it on to our graphic designer to redesign the icons. While you can see…
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Translink GTFS
I recently became aware that Translink, Queensland’s public transport provider, openly publishes both a GTFS (General Transit Feed Specification) Static dataset and Realtime feed. The GTFS Static dataset provides information on routes, schedules, stops and pathing, while the Realtime feed provides information on current vehicle lat/long coordinates and delay information. I created a web app…
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Querying ArcGIS attribute subtypes and domains with SQL
ArcGIS geodatabases have the concept of domains, where an attribute can be restricted to a set of values, similar to a drop down list. Furthermore, geodatabases also allow an attribute to be specified as a subtype where the subtype determines which set of domains that apply to attributes. This can be used when setting up…
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Creating a ArcGIS map service raster layer in PyQGIS
It’s relatively straightforward creating layers programatically in QGIS using PyQGIS. However, the documentation isn’t clear on how to use create a raster layer from a ArcGIS map service. The list of raster providers can be found by searching for addRasterProviderDialog in qgsdatasourcemanagerdialog.cpp. There are two mandatory parts to the data source string when specifying the…