ArcPy – Listing Datasets in the In-Memory Workspace in ArcGIS Pro

arcgis-proarcpyin-memorylistworkspace

I have some sensitive data which I would prefer to only exist in memory that I wish to use in ArcGIS Pro. Loading the data into the "memory" workspace is no problem, and so is deleting it, but managing large numbers of layers in memory is problematic.

In ArcGIS Pro, is there any way to list the data available in the "memory" workspace?

Deleting the associated layers does not remove the data

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This question was cross posted to List data in "memory" workspace -- Esri Community, and below is my reply over there.

Not all ArcPy functions that work with workspaces, e.g., ListFeatureClasses, work with the new "memory" workspace. ArcPy DA Walk usually does if you know the underlying name of the workspace and not its "memory" alias. Try:

next(arcpy.da.Walk("InMemoryDB\GPProMemoryWorkspace"))

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[GIS] List layers from current view using Arcpy

A DataFrame object has an extent property, the extent property/object can be used in the basic spatial relationship methods of contains, within, equals, overlaps, touches and disjoint as well as distanceTo, see here for more details on those methods.

With that in mind you can loop over the layers you retrieve from calling arcpy.mapping.ListLayers(mxd,"", df) and retrieve each layers extent by calling the getExtent method on each layer. The spatial relationships discussed above can be tested between the extent.polygon object of each layer and the dataframe to determine if they are indeed within the extent of the dataframe. If you are using data driven pages the extent of each page can be retrieved with an mxd object with this call mxd.dataDrivePages.dataFrame.extent.

It is important to note that the extent of a layer often has a larger footprint that than the actual vector within the layer (e.g. the polygon, points, raster, etc.), so depending on the spatial relationship you choose to test it may include more layers than are actually visible. Here is an example (thanks @KHibma) of how you would use a spatial relationship method of the DataFrame with a Layer object:

mxd = arcpy.mapping.MapDocument("CURRENT")
df = arcpy.mapping.ListDataFrames(mxd)[0]
for l in arcpy.mapping.ListLayers(df):
    if not df.extent.disjoint(l.getExtent()): 
        print l.name

ArcPy – How to Restrict Parameter Value Lists Based on Another’s Chosen Value in ArcGIS Pro

To do this I think you should investigate using a Filter class:

The filter object allows you to specify the choices available for a parameter.

On that page of the documentation there is:

An example where the value list filter in the second parameter changes based on the shape type found in the first parameter, a feature class.

You could adjust that code to be an example where the value list filter in the second parameter changes based on the value chosen in the first parameter.

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Related Solutions

[GIS] List layers from current view using Arcpy

ArcPy – How to Restrict Parameter Value Lists Based on Another’s Chosen Value in ArcGIS Pro

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