How to speed up the selection process in ArcGIS?

How to speed up the selection process in ArcGIS?

A couple potential suggestions to help speed up your process are: Select Layer By Attribute can be in a Python-only script, without ever launching ArcGIS Desktop. You need to convert your “buff” reference from a file-based reference to an “ArcGIS layer” reference, which ArcGIS can process selection queries against.

How to use in memory workspace in ArcPy?

Use arcpy.MakeFeatureLayer_management (“buff”,”buff_lyr”) above your “while” loop, and then change your references below the while loop to use “buff_lyr”. Process as much of your GP operations using the in_memory workspace as possible…

How long does it take to make new ArcPy cursors?

The old arcpy cursor objects broke at 10.1 sp2 and the only way ESRI could fix it was to create the new arcpy.da cursor objects. I had a process that ran in 10.1 sp1 that took 18 hours using the old cursor objects. After sp2 it took over 12 days before I killed it. The new arcpy.da cursors takes 4 hours.

How to change the reference to buff in ArcGIS?

You need to convert your “buff” reference from a file-based reference to an “ArcGIS layer” reference, which ArcGIS can process selection queries against. Use arcpy.MakeFeatureLayer_management (“buff”,”buff_lyr”) above your “while” loop, and then change your references below the while loop to use “buff_lyr”.

Why do you need a layer object in ArcGIS?

The Layer object is essential for managing layers that reside within a map document ( .mxd) or within a layer ( .lyr) file. The layer object provides access to many of the common layer properties found in the ArcMap Layer Properties dialog box and it also provides methods for saving layer files.

Are there properties not exposed to ArcPy scripting environment?

Not all layer properties are accessible through the Layer object. There are many properties available in the ArcMap Layer Properties dialog box that are not exposed to the arcpy scripting environment (for example, display properties, field aliases, selection symbology, and so on).

How to move source into memory in ArcPy?

Use arcpy.CopyFeatures_management (shapefile, “in_memory\\memFeatureClass”) to move your source into memory. This only works well if you have enough RAM to read all of the feature class (es) that you need into memory. Beware, however, that there are some GP operations that cannot run using the in_memory workspace (Eg: the Project tool).

Is it faster to run a script outside of ArcMap?

Running the script completely outside of ArcMap can be much faster. If a Map isn’t required during the processing, then don’t use ArcMap.

Why does debugging take so long in Visual Studio?

When you start debugging (F5), if there are any pending edits the debugger will trigger a compilation, build and deploy of the application which can take a long time. Once the compilation, build, and deploy is complete the debugger will proceed to launch the application and start debugging.

What do the merge rules do in ArcGIS?

Merge rules allow you to specify how values from two or more input fields are merged or combined into a single output value. There are several merge rules that determine how the output field is populated with values. First—Use the input fields’ first value. Last—Use the input fields’ last value.

What to do when ArcGIS is running slow?

Here are some options to handle that problem. Your first option is simple – figure out which layers are slow and disable them. This is often not a good option for people. Here’s a common situation. You open ArcMap and add your data to the map. You decide you want some context for your data, so you add a Basemap – and now ArcGIS slows down.

Why does ArcGIS take so long to reproject?

If your dataset is large, you may find that it takes a long time to reproject too – maybe long enough to warrant switching the map document back to its original projection (if you’ve forgotten, look at the Source tab of the Properties dialog for your dataset).

What’s the easiest way to use Python in ArcGIS?

The simplest way to use Python in ArcGIS is to enter Python commands into the Python window. The Python window prompts with three greater-than symbols ( >>>), indicating the first line of the code block to execute.

Can a Python window be used for Geoprocessing?

However, there are other, more efficient ways to execute geoprocessing tools or operations, such as Python scripting. The Python window is a fully interactive Python interpreter (or interface) that allows geoprocessing tools and python functionality to be executed inside an ArcGIS for Desktop application.