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Extended functionality for Esri's ArcPy site-package

Project description

arcpyext provides a collection of helper functions that make common tasks performed with the Esri ArcPy site-package easier to accomplish. It was chiefly developed to service a command-line tool set (agstools) for managing ArcGIS environments, but can readily be used within other scripts.

Features

Currently, arcpyext has functionality for changing data sources for map document layers, preparing map documents for publishing, and performing CRUD operations within an edit session on a geo-database.

arcpyext.conversion

The conversion module features simple functions for converting workspaces (file geodatabase, enterprise geodatabase), and the items in them, into other formats.

Supported formats are:

  • Shapefile
  • MapInfo TAB (requires the ArcGIS Data Interoperability extension)
  • GeoPackage
  • Keyhole Markup Language (KML)
  • Office Open XML Workbook (Excel .xlsx file)
  • Comma-Separated Values text file

Example A - Convert File Geodatabase to a GeoPackage

import arcpyext.conversion

INPUT_WORKSPACE = "path/to/input_geodatbase.gdb"
OUTPUT_GEOPACKAGE = "path/to/output/geopackage.gpkg"

arcpyext.conversion.to_geopackage.workspace(INPUT_WORKSPACE, OUTPUT_GEOPACKAGE)

Example B - Convert File Geodatabase to an Office Open XML Spreadsheet (Excel spreadsheet)

import arcpyext.conversion

INPUT_WORKSPACE = "path/to/input_geodatbase.gdb"
OUTPUT_WORKBOOK = "path/to/output/workbook.xlsx"

arcpyext.conversion.to_ooxml_workbook.workspace(INPUT_WORKSPACE, OUTPUT_WORKBOOK)

arcpyext.data

The data module wraps the basic create, update and delete operations in an edit session, automatically starting/ stoping/aborting an edit operation as appropriate. The functions simply wrap the appropriate arcpy.da cursors, so functionally they work identically. Also provided is a handy function for reading rows into a list.

Example

import arcpy
import arcpyext.data

#WORKSPACE = "path/to/sde_database.sde"
WORKSPACE = "path/to/geodatabase.gdb"
TABLE = "Countries"

edit_session = arcpy.da.Editor(WORKSPACE)
edit_session.startEditing()

try:
    arcpyext.data.delete_rows(edit_session, TABLE, "Name LIKE 'A%'", ('Name'))
except RuntimeError, re:
    edit_session.stopEditing(False)

edit_session.stopEditing(True)
del edit_session

See the associated tests for more code examples.

arcpyext.mapping

The mapping module provides features for:

  • describing a map document/project
  • changing the data sources of a layer (or layers) in an ArcGIS Map Document or ArcGIS Project,
  • easily checking if a map document/project is in a valid state
  • comparing different versions of a map document/project

Describing a Map Document/ArcGIS Project

Describing a map document/project productions a dictionary detailing many of the details about a map document. Map documents/projects can be described as follows:

import arcpyext

path_to_mxd_or_project = "path/to/arcgis/map_doc.mxd" # or *.aprx file on ArcGIS Pro

description = arcpyext.mapping.describe(path_to_mxd_or_project)

The ouput description will have the following structure:

{
    "filePath": "C:\\projects\\public\\arcpyext\\tests\\samples\\test_mapping_complex.mxd",

    # an ordered list of maps contained in the map document/project
    "maps": [
        {
            "name": "Layers",
            "spatialReference": "GEOGCS['GCS_GDA_1994',DATUM['D_GDA_1994',SPHEROID['GRS_1980',6378137.0,298.257222101]],PRIMEM['Greenwich',0.0],UNIT['Degree',0.0174532925199433]];-400 -400 1000000000;-100000 10000;-100000 10000;8.98315284119521E-09;0.001;0.001;IsHighPrecision",

            # an ordered list of layers contained in the map
            "layers": [
                {
                    "dataSource": "C:\\projects\\public\\arcpyext\\tests\\samples\\statesp020_clip1",
                    "database": "C:\\projects\\public\\arcpyext\\tests\\samples",
                    "datasetName": "statesp020_clip1",
                    "datasetType": "Shapefile Feature Class",
                    "definitionQuery": "FID <1",
                    "fields": [
                        {
                            "alias": "FID",
                            "index": 0,
                            "name": "FID",
                            "type": "OID",
                            "visible": true
                        },
                        {
                            "alias": "SHAPE",
                            "index": 1,
                            "name": "Shape",
                            "type": "Geometry",
                            "visible": true
                        },
                        {
                            "alias": "AREA",
                            "index": 2,
                            "name": "AREA",
                            "type": "Double",
                            "visible": true
                        },
                        {
                            "alias": "PERIMETER",
                            "index": 3,
                            "name": "PERIMETER",
                            "type": "Double",
                            "visible": true
                        },
                        {
                            "alias": "STATE",
                            "index": 5,
                            "name": "STATE",
                            "type": "String",
                            "visible": true
                        }
                    ],
                    "index": 0,
                    "isBroken": false,
                    "isFeatureLayer": true,
                    "isGroupLayer": false,
                    "isNetworkAnalystLayer": false,
                    "isRasterLayer": false,
                    "isRasterizingLayer": null,
                    "isServiceLayer": null,
                    "longName": "Layer 1",
                    "name": "Layer 1",
                    "server": null,
                    "service": null,
                    "serviceId": 1,
                    "userName": null,
                    "visible": true
                }
            ],

            # an ordered list of the tables contained in the map
            "tables": [
                {
                    "dataSource": "C:\\projects\\public\\arcpyext\\tests\\samples\\statesp020.txt",
                    "database": "C:\\projects\\public\\arcpyext\\tests\\samples",
                    "datasetName": "statesp020.txt",
                    "datasetType": "Text File",
                    "definitionQuery": "",
                    "fields": [
                        {
                            "alias": "Identification_Information:",
                            "index": 0,
                            "name": "Identification_Information:",
                            "type": "String",
                            "visible": true
                        }
                    ],
                    "index": 0,
                    "isBroken": false,
                    "name": "statesp020.txt",
                    "server": null,
                    "service": null,
                    "serviceId": 7,
                    "userName": null
                }
            ]
        }
    ]
}

Changing Data Sources

Changing data sources across both map documents and projects is made easy by creating templates with match criteria, and then evaluating those templates against a map document or project to generate a list of replacement data sources for layers that match.

Templates have slightly different structures depending on whether you are editing an ArcGIS Map Document or an ArcGIS Project.

ArcGIS Map Document:

"dataSource": {
    # The *dataSource* property points to the replacement data source
    # The contents of the property depends on whether your changing data sources on a map document or a project

    "workspacePath": "path/to/workspace/if/changed",
    "datasetName": "nameOfTheNewDatasetIfChanged",
    "wokspaceType": "workspaceTypeIfChanged",
    "schema": "databaseSchemaNameIfChanged"
},
"matchCriteria": {
    # properties that match against properties discovered when describing a layer
    # strings are compared ingoring case
    # an empty dictionary is also valid, which will match all layers

    # Changing user is a common use case for updating data sources
    "userName": "ExistingUserName"
}

ArcGIS Project:

"dataSource": {
    # Any properties decribed at the following address under the *Using the connectionProperties dictionary*
    # section header are valid: https://pro.arcgis.com/en/pro-app/arcpy/mapping/updatingandfixingdatasources.htm

    # Example
    "connection_info": {
        "database": "path/to/database"
    },
    "dataset": "NewDataset"
},
"matchCriteria": {
    # properties that match against properties discovered when describing a layer
    # strings are compared ingoring case
    # an empty dictionary is also valid, which will match all layers

    # Changing user is a common use case for updating data sources
    "userName": "ExistingUserName"
}

A list of templates can be used to create a replacement list of data sources for a map document or project.

import arcpyext

path_to_mxd_or_project = "path/to/arcgis/map_doc.mxd" # or *.aprx file on ArcGIS Pro
data_source_templates = [
    # one or more templates goes hear
    "dataSource": {
        "workspacePath": "./newDatabaseConnection.sde"
    },
    "matchCriteria": {
        # match everything
    }
]

replacement_data_source_list = arcpyext.mapping.create_replacement_data_sources_list(
                                path_to_mxd_or_project,
                                data_source_templates)

The generated replacement data source list can then be fed back into arcpyext to update all of the matched layers and tables:

arcpyext.mapping.change_data_sources(path_to_mxd_or_project, replacement_data_source_list)

Check a Map Is Valid

A conveniance method exists to quickly test whether a map document/project is in a valid state or not (i.e. has broken layers/tables or not). This can be called as follows:

import arcpyext

path_to_mxd_or_project = "path/to/arcgis/map_doc.mxd" # or *.aprx file on ArcGIS Pro

arcpyext.mapping.is_valid(path_to_mxd_or_project)

arcpyext.publishing

The publishing modules provides conveniant functions for creating service definition or drafts from the first map in an ArcGIS Map Document or ArcGIS Project.

Create a Service Definition Draft from a Map Document

This function checks that the map does not have any broken data sources before crafting a service definition draft.

import arcpyext

path_to_mxd_or_project = "path/to/arcgis/map_doc.mxd" # or *.aprx file on ArcGIS Pro
output_path = "path/to/sddraft/output.sddraft"
service_name = "ExampleMapService"

arcpyext.publishing.convert_map_to_service_draft(path_to_mxd_or_project, output_path, service_name)

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