Turning location data into business insight — PostGIS · Python · QGIS
Based in Japan · Available for freelance projects · English & Japanese
I build clean, reproducible geospatial workflows for business problems that involve location — trade area sizing, demographic profiling, route analysis, and site selection.
Typical deliverables:
- Spatial analysis using PostGIS and QGIS — from raw data to actionable output
- Python pipelines for government open data ingestion (US Census, Japan e-Stat)
- GIS data processing and format conversion (Shapefile, GeoJSON, CSV)
- OpenStreetMap data extraction and integration
- QGIS-compatible map layers with demographic overlays
I value clear scoping up front and always deliver well-structured, reproducible workflows.
Before freelancing, I spent over 20 years as an engineer in the automotive industry. During this time I worked hands-on with GIS data in navigation map development projects, using QGIS and PostGIS to inspect, process, and analyze real-world geospatial datasets.
That industry background means I am comfortable handling production-level data, coordinating across teams, and delivering to specification.
County-level spatial analysis toolkit for the United States.
- PostGIS SQL templates: population density, elderly rate choropleth, route analysis
- Python pipelines for TIGER/Line boundaries + ACS 5-year estimates + Decennial Census 2020
- Covers ~3,221 counties nationwide
Municipality-level spatial analysis toolkit for Japan.
- 15 PostGIS SQL templates: trade area population, delivery zone assignment, route analysis
- e-Stat census data integration · 1,917 municipalities
- Python GIS utility library (JIS mesh codes, DMS conversion, Japan Plane Rectangular)
- Remote · English & Japanese
- Upwork: View profile & hire
PostGIS・Python・QGISを使った空間データ分析のフリーランス案件を承っています。
得意分野:
- 商圏分析・人口統計分析(国勢調査・ACSデータ活用)
- GISデータの処理・クリーニング・フォーマット変換(Shapefile、GeoJSON等)
- OpenStreetMapデータの抽出・加工
- 政府オープンデータの取り込みパイプライン構築(e-Stat・US Census)
- QGISによるコロプレスマップ出力
経歴: 前職では自動車業界にて長年エンジニアとして勤務し、車載ナビゲーション地図データの開発に携わりながらQGISとPostGISを業務で使用してきました。
ポートフォリオ:
- 分析サンプル・実績まとめ(日本語) — ユースケース別に画像・SQLサンプル付きで紹介
- 🇺🇸 US版(郡レベル空間分析)
- 🇯🇵 日本版(市区町村レベル空間分析)
クラウドワークス: プロフィールを見る