SPM for ZWCAD > Features > Spatial analysis > Areas of Influence

Areas of Influence in ZWCAD

Creates polygons defined by the sets of points closest to each point of a selection in the drawing (Voronoi diagrams)

Editions: Professional

Areas of Influence

Generates polygons representing areas of influence around selected points based on proximity.

These polygons, known as Voronoi diagrams, define regions closest to each point in the selection. Each resulting polygon inherits the attribute data of its corresponding point.

This functionality is useful for spatial analysis tasks such as identifying coverage zones for pharmacies within a municipality or similar proximity-based studies.

frequently asked questions
Current compatible ZWCAD applications:
  • ZWCAD and ZWCAD Architecture
  • Professional edition (Classic and Standard editions are not compatible, but you can use Spatial Manager Desktop™ to import/export via DXF files)
  • Versions: From v.2017 to v.2026 both included. Review the version compatibility page for more details.
System requirements:
  • Windows 7 or higher, within the operating system versions supported by the ZWCAD version used
  • 500 MB free disk space, or more
  • Windows Installer 3.1 or later
Spatial files
  • Esri Shape file - (SHP)
  • Google Earth file - (KML, KMZ)
  • OpenStreetMap file - (OSM, PBF, OSC) (1)
  • LiDAR file - (LAS, LAZ)
  • GPS exchange format file - (GPX)
  • Esri ASCII Grid file - (ASC, ASCII) (1)
  • ASCII text file - (ASC, CSV, NEZ, TXT, XYZ, UPT)
  • SQLite file - (SQLITE, DB)
  • GeoPackage file - (GPKG)
  • GML file - (GML, GZ, XML)
  • Raster image file - (TIF, PNG, JPG, JPEG, TIFF) (1)
  • Autodesk SDF file - (SDF) (3)
  • MicroStation v.7 file - (DGN) (2)
  • AutoCAD DXF file - (DXF) (2)
  • Esri ArcInfo export file (ASCII) - (E00) (1) (2)
  • MapInfo file - (TAB) (2)
  • MapInfo interchange format file - (MIF/MID) (2)
  • GeoJSON file - (GEO.JSON)

Spatial raster files
  • Raster image file - (TIF, PNG, JPG, JPEG, TIFF) (1)
    • Georeference sources - (World files, Google Earth .GEPRINT, etc.)
  • Variable resolution Raster image file - (Cloud Optimized GeoTIFF/COG TIFF) (1) (4)

Spatial data servers and Geo-databases
  • Esri Geodatabase File - (GDB) (1)
  • PostGIS database
  • Microsoft SQL Server Spatial database
  • MySQL database (1) (3)

Image map servers
  • WMS/OGC API Maps Web Map Services (4)
  • WMTS/OGC API Tiles Web Map Tile Services (4)
  • XYZ/TMS Tile Map Services (4)

Other spatial data sources
  • Open Database Connectivity ODBC (1)
  • WFS/OGC API Features data store (1)
  • WFS data store (FDO) (1) (3) (5)
  • WFS data store (OGR) (1) (2) (5)

(1) Read-only
(2) OGR data source
(3) FDO provider
(4) Background Maps technology
(5) DEPRECATED - Whenever possible use the native WFS/OGC API Features data provider

Note: certain data Providers are only valid for some Editions of the application