feat: derive extent from point coordinates in CreateNetworkDataset

When point features are supplied as the area of interest, compute the
download bbox from actual min/max coordinates (via cursor) rather than
desc.extent, which may reflect the spatial domain instead of true data
extent.

- Project points to WGS84 first if needed, then read SHAPE@XY via cursor
- Non-point geometry types continue to use extent.projectAs(wgs84)
- Expand the WGS84 bbox by ~1 mile in each direction before downloading
  and before building the clip polygon
- Clip polygon always created in WGS84 to match the normalised extent

Author: knu2xs

arcgis/overture_to_arcgis.pyt

@@ -885,7 +885,7 @@ class CreateNetworkDataset:
             parameterType="Required",
             direction="Input"
         )
-        download_data.value = False
+        download_data.value = True
 
         # extent for downloading data
         extent = arcpy.Parameter(
@@ -997,13 +997,39 @@ class CreateNetworkDataset:
                 desc = arcpy.Describe(extent_features)
                 extent = desc.extent
                 spatial_reference = desc.spatialReference
-
-                if spatial_reference.factoryCode != 4326:
-                    logger.info("Projecting extent to WGS84 (EPSG:4326).")
-                    projected_extent = extent.projectAs(arcpy.SpatialReference(4326))
-                    bbox = (projected_extent.XMin, projected_extent.YMin, projected_extent.XMax, projected_extent.YMax)
+                is_point_input = desc.shapeType in ("Point", "Multipoint")
+
+                wgs84 = arcpy.SpatialReference(4326)
+
+                if is_point_input:
+                    # project to WGS84 first if needed, then derive extent from actual coordinates
+                    if spatial_reference.factoryCode != 4326:
+                        logger.info("Projecting point features to WGS84 (EPSG:4326).")
+                        pts_for_extent = arcpy.management.Project(extent_features, "memory/extent_points_proj", wgs84)[0]
+                    else:
+                        pts_for_extent = extent_features
+
+                    x_coords, y_coords = [], []
+                    with arcpy.da.SearchCursor(pts_for_extent, ["SHAPE@XY"]) as cursor:
+                        for row in cursor:
+                            x, y = row[0]
+                            x_coords.append(x)
+                            y_coords.append(y)
+
+                    buffer_dist = 1609.344 / 111320.0  # approx. 1 mile in degrees
+                    logger.info("Point features provided as area of interest; expanding extent by ~1 mile in each direction.")
+                    extent = arcpy.Extent(
+                        min(x_coords) - buffer_dist,
+                        min(y_coords) - buffer_dist,
+                        max(x_coords) + buffer_dist,
+                        max(y_coords) + buffer_dist,
+                    )
                 else:
-                    bbox = (extent.XMin, extent.YMin, extent.XMax, extent.YMax)
+                    if spatial_reference.factoryCode != 4326:
+                        logger.info("Projecting extent to WGS84 (EPSG:4326).")
+                        extent = extent.projectAs(wgs84)
+
+                bbox = (extent.XMin, extent.YMin, extent.XMax, extent.YMax)
                 logger.info(f"Retrieving Overture features for extent: {bbox}.")
 
                 # create temp directory and geodatabase for downloaded data
@@ -1020,9 +1046,19 @@ class CreateNetworkDataset:
                 connector_fc = str(Path(temp_gdb) / "connectors")
                 overture_to_arcgis.get_features(connector_fc, bbox=bbox, overture_type="connector")
 
-                # remove features outside the extent geometry
-                ext_lyr = arcpy.management.MakeFeatureLayer(extent_features)[0]
+                # create feature layer for extent features
+                logger.debug("Creating feature layer for extent features to use for spatial filtering.")
+                array = arcpy.Array([
+                    arcpy.Point(extent.XMin, extent.YMin),
+                    arcpy.Point(extent.XMin, extent.YMax),
+                    arcpy.Point(extent.XMax, extent.YMax),
+                    arcpy.Point(extent.XMax, extent.YMin),
+                    arcpy.Point(extent.XMin, extent.YMin),
+                ])
+                extent_polygon = arcpy.management.CopyFeatures([arcpy.Polygon(array, wgs84)], "memory/extent_polygon")[0]
+                ext_lyr = arcpy.management.MakeFeatureLayer(extent_polygon)[0]
 
+                # remove features outside the extent geometry
                 seg_lyr = arcpy.management.MakeFeatureLayer(segment_fc)[0]
                 arcpy.management.SelectLayerByLocation(seg_lyr, "INTERSECT", ext_lyr, selection_type="NEW_SELECTION", invert_spatial_relationship=True)
                 arcpy.management.DeleteFeatures(seg_lyr)

arcgis/overture_to_arcgis.pyt.xml

@@ -1,2 +1,2 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<metadata xml:lang="en"><Esri><CreaDate>20251022</CreaDate><CreaTime>11025600</CreaTime><ArcGISFormat>1.0</ArcGISFormat><SyncOnce>TRUE</SyncOnce><ModDate>20260318</ModDate><ModTime>234516</ModTime></Esri><toolbox name="overture_to_arcgis" alias="overture_to_arcgis"><arcToolboxHelpPath>c:\program files\arcgis\pro\Resources\Help\gp</arcToolboxHelpPath><toolsets/></toolbox><dataIdInfo><idCitation><resTitle>overture_to_arcgis</resTitle></idCitation><searchKeys><keyword>Overture Maps</keyword><keyword>ArcGIS Pro</keyword><keyword>transportation</keyword><keyword>network dataset</keyword><keyword>geoprocessing</keyword></searchKeys><idAbs>Python Toolbox for downloading, processing, and analysing Overture Maps data in ArcGIS Pro. Includes tools for retrieving Overture features, parsing complex JSON fields into usable attribute columns, splitting segments by subclass and level rules, splitting segments at connector points, and building walk-optimised network datasets.</idAbs></dataIdInfo><distInfo><distributor><distorFormat><formatName>ArcToolbox Toolbox</formatName></distorFormat></distributor></distInfo></metadata>
+<metadata xml:lang="en"><Esri><CreaDate>20251022</CreaDate><CreaTime>11025600</CreaTime><ArcGISFormat>1.0</ArcGISFormat><SyncOnce>TRUE</SyncOnce><ModDate>20260319</ModDate><ModTime>094824</ModTime></Esri><toolbox name="overture_to_arcgis" alias="overture_to_arcgis"><arcToolboxHelpPath>c:\program files\arcgis\pro\Resources\Help\gp</arcToolboxHelpPath><toolsets/></toolbox><dataIdInfo><idCitation><resTitle>overture_to_arcgis</resTitle></idCitation><searchKeys><keyword>Overture Maps</keyword><keyword>ArcGIS Pro</keyword><keyword>transportation</keyword><keyword>network dataset</keyword><keyword>geoprocessing</keyword></searchKeys><idAbs>Python Toolbox for downloading, processing, and analysing Overture Maps data in ArcGIS Pro. Includes tools for retrieving Overture features, parsing complex JSON fields into usable attribute columns, splitting segments by subclass and level rules, splitting segments at connector points, and building walk-optimised network datasets.</idAbs></dataIdInfo><distInfo><distributor><distorFormat><formatName>ArcToolbox Toolbox</formatName></distorFormat></distributor></distInfo></metadata>