Centralize LGU WebGIS
A centralized GIS platform connecting 1,000+ personnel across city offices. It transforms scattered spatial data into one controlled, accessible, and up-to-date source for the entire LGU.
- codex
- django
- qgis
CAD to GIS. Masterplans to interactive WebGIS.
Turn CAD drawings and land parcel records into organized GIS layers and interactive maps for planning, engineering, and property teams. Parcel and tax mapping, masterplan WebGIS, and a clear client handover.
CAD-to-GIS · Land Parcels · Masterplan WebGIS
Projects / Selected work
GIS and WebGIS work in practice.
Explore the source data, technical decisions, and outputs behind my GIS work.
AI-Assisted Transmission Line & Wildlife Analysis
An AI-assisted GIS application for analyzing the relationship between electrical transmission infrastructure and wildlife / public-access lands in California's San Joaquin Valley.
- claude
- fast api
- mcp
- python
600K CAD to GIS Land Parcel Management
A production-ready CAD-to-GIS workflow that converts fragmented AutoCAD parcel data into structured, searchable GIS data for local government land information management.
- .net
- autocad
- c#
- django
About Me
Joshua De Leon
I'm a freelance GIS developer focused on CAD-to-GIS conversion, land parcels, and masterplan drawings to interactive WebGIS. I combine GIS and software development to organize drawing data and make it easier to explore and use.
My focus includes linking parcel geometry to client-provided tax records and preparing map layers for planning teams, with utility layers included where relevant. Each project starts with your source data and defines the checks, deliverables, and documentation your team needs for handover.
Connect with Me
Freelance GIS / Project fit
GIS support for planning, engineering, and land-record teams.
Working with CAD drawings, property boundaries, or a masterplan that your team needs to explore online? My focus is helping planners, engineering consultants, property developers, and local government land-record teams turn those materials into usable spatial data and interactive maps.
CAD-to-GIS conversion
Start with your drawing files, layer structure, and coordinate reference information. We'll define the GIS layers, attribute fields, output formats, and geometry checks needed for your workflow.
Land parcel and tax mapping
Bring parcel boundaries, parcel identifiers, and the records you need linked to the map. The scope can include matching records to parcels and documenting missing identifiers or unmatched records for review.
Masterplan drawings to interactive WebGIS
Make a masterplan easier to explore in a browser. Define the map layers, feature details, and search or filtering tools your team needs, with supporting utility layers where relevant.
What will your team receive?
Agree on the data files, map functionality, deployment and access, source-code handover where included, and usage documentation before work begins. Share your file formats, project location, intended users, and preferred GIS software so we can check the fit.
Discuss your CAD-to-GIS or WebGIS project