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TomoImai-GIS/README.md

Tomo Imai — GIS & Spatial Data Engineer

🇯🇵 日本語プロフィールはこちら

Turning location data into business insight — PostGIS · Python · QGIS

Based in Japan  ·  Available for freelance projects  ·  English & Japanese

Upwork


What I Do

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.


Background

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.


Portfolio

🇺🇸 GIS Trade Area Analysis — US

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

Repo

🇯🇵 GIS Trade Area Analysis — Japan

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)

Repo


Tools & Stack

PostgreSQL PostGIS Python QGIS pandas OpenStreetMap


Availability


日本語プロフィール

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:

クラウドワークス: プロフィールを見る

Popular repositories Loading

  1. gis-trade-area-analysis gis-trade-area-analysis Public

    PostGIS SQL templates and Python tools for trade area analysis and demographic mapping in Japan

    Python

  2. gis-trade-area-analysis-us gis-trade-area-analysis-us Public

    PostGIS SQL templates and Python tools for trade area analysis and demographic mapping in the US

    Python

  3. TomoImai-GIS TomoImai-GIS Public

    GitHub Profile README