How to extract service layer to shapefile in Python?

How to extract service layer to shapefile in Python?

We are essentially just going to wrap 3 small steps into a python file: 1 Query the web service layer for data 2 Save the results locally 3 Convert results to a shapefile (or other feature class type) More

Is there any way to only read specific attribute columns of a shapefile?

Unfortunately, I have some shapefiles which contain lots of attribute columns which I don’t need in the end, slowing down the reading process a lot. Is there any possibility to limit the reading of the shapefile to specific attribute columns?

Why is the shape field hidden in Python?

This occurs when a layer in a map service is published but the SHAPE field is hidden from the service. In this case, you still get all the attributes but no spatial component as the SHAPE field must be visible in the service for the geometry to be returned. Here is the full python script.

How to read specific attribute columns in Python?

It is possible to use the ogr2ogr tool to do the attribute filtering in advance and then read the filtered shapefiles with geopandas / Fiona. My subjective impression is that this is faster than reading the unfiltered shapefiles directly (however, I thought both ogr2ogr and Fiona use the same shapefile reading engine under the hood?!).

How to output feature to shapefile in Python?

You may use the Feature Class To Feature Class python snippet. Here is the general syntax. To output to a shapefile, make sure that your out_path is a folder (and not pointing within a file geodatabase), and that out_name has a *.shp extension.

How to convert a layer package to a shapefile in ArcGIS?

ArcMap Use the Feature Class To Shapefile (multiple) tool to convert a layer package to a shapefile in ArcMap. In File Explorer, select and click the desired layer package file to open it in ArcMap. The image below shows an example of an ArcMap layer package file, Transportation.

How to calculate the Count of features in shapefile?

Make a query and set the Result Option returnCountOnly=true. This returns the count so you can determine if one query will be enough. For the example with US States, there are only 51 features, so the 1=1 clause isn’t a problem.

Why is the shape field hidden in shapefile?

Just use the IDs to divide into chunks less than the limit, and loop away. A final issue that can occur is that the output shapefile isn’t a shapefile – just a DBF. This occurs when a layer in a map service is published but the SHAPE field is hidden from the service.

Can you download a shapefile from the Internet?

Please make sure you have permission from the owner of the Data/Map Service, or have permission via a License (“Licence” in Canada) before running around downloading shapefiles from the internet.