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Sharing GIS Technologies, Resources and News.

Layer Swipe in QGIS: Plugin Solutions

In a previous article "Practical Application of Geo Hound: Extracting Wuhan's Unified Planning Map Services for GIS Analysis", I demonstrated using Geo Hound to access Wuhan's planning map data in QGIS. A key objective was comparing land-use planning attributes against reality to identify discrepancies. While I mentioned using layer swipe for this comparison, many readers inquired about implementing swipe functionality in QGIS.

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China Geographic Regional Partition Data: SHP Vector Files

Following my previous article "This Certification is Highly Valuable for GIS Job Seekers, Yet Overlooked by Many", which helped numerous GIS professionals advance their careers, a middle school geography teacher recently requested vector data for China's geographic regional partitions for classroom presentations. After research, I'm sharing this valuable dataset.

Data Specifications

  • Geographic Coordinate System: GCS_Krasovsky_1940
  • Projected Coordinate System: Krasovsky_1940_Albers
  • Regions Included:

    • Tarim and Turpan Basins
    • Qaidam Basin
    • Central Shanxi-Northern Shaanxi-Eastern Gansu Plateau
    • Eastern Qinghai-Qilian Mountains
    • Liaodong-Jiaodong Hills
    • Central Shandong Hills
    • Southern Shanxi-Guanzhong Basin
    • Ngari Mountains
    • Qiangtang Plateau Lake Basin
    • Western Sichuan-Eastern Tibet High Mountains
    • Sichuan Basin
    • Jiangnan and Nanling Mountains
    • Guizhou Plateau
    • Jiangnan Hills
    • Yunnan Plateau
    • Qiong-Lei Hills
    • Sanjiang Plain
    • Northeastern Mountain Region
    • Northeastern Piedmont Plain
    • Central Songliao Plain
    • Southern Greater Khingan Range
    • Sanhe Piedmont Hills
    • Southwestern Songliao Plain
    • Eastern Inner Mongolia High Plain
    • Western Inner Mongolia High Plain
    • Northern Kunlun Mountains
    • Junggar Basin
    • Altai Mountains and Tacheng Basin
    • Ili Basin
    • North China Plain
    • Southern Himalayas
    • Fujian-Guangxi-Guangdong Hills and Plains
    • Kunlun Alpine Plateau
    • Central-Northern Taiwan Mountains and Plains
    • Golog-Nagqu Hilly Plateau
    • Alxa and Hexi Corridor
    • Qiong-Lei Lowlands
    • South Tibet Mountains
    • Qiong-Lei Lowlands and Dongsha Islands
    • Southern Yunnan Valleys and Hills
    • Southern Qinghai Plateau Wide Valleys
    • Hanzhong Basin
    • Huainan and Middle-Lower Yangtze Plains
    • North China Hills
    • Southern Taiwan Lowlands
    • Greater Khingan Range

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QGIS 3.44 Released with Official Support for 3D Globe View!

QGIS 3.44 has now been officially released. I downloaded and tried it out immediately. For Windows users, QGIS 3.44 offers both a test version with Qt6 support ("Latest Version for Windows (3.44) with Qt6 (experimental)") and the standard 3.44 version ("Latest Version for Windows (3.44)").

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Extracting Shanghai's Planning Map Services with Geo Hound: A Practical Workflow

Following my previous article on extracting Wuhan's planning map services using Geo Hound, the original Wuhan data source implemented access restrictions. For a recent leadership demonstration, I identified an alternative: Shanghai's Detailed Planning Map service.

Note: While workarounds exist for Wuhan's restricted data, this article focuses on ethically accessible sources.

Shanghai Detailed Planning Map

Shared by members of the MalaGIS community (special thanks!), this official platform provides comprehensive urban planning data:
https://shanghai.tianditu.gov.cn/xg/map.html

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Global Continent Boundary Datasets: A Comparative Analysis

Following my previous article "GIS Data: Global Time Zone Boundary Data (SHP Format)", several readers requested global continent boundary datasets. Surprisingly, this data proved readily available. Below is a comparative overview of three authoritative sources.

Data Preview:

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Native QGIS on Apple Silicon: Solutions and Workarounds for GIS Professionals

As Mac gains popularity among professionals, many GIS users inquire about its suitability for geospatial work. While Windows remains the preferred platform for comprehensive GIS workflows, Mac + QGIS handles basic to intermediate geospatial tasks effectively.

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Practical Application of Geo Hound: Extracting Wuhan's Unified Planning Map Services for GIS Analysis

Geo Hound is a browser extension that automatically captures map service links from web pages and centralizes their management. In a previous article, I introduced this tool using a Japanese map service example. To demonstrate its practical value, I'll showcase its application with Wuhan's Unified Planning Map.

Wuhan Unified Planning Map

This platform integrates legally approved regulatory plans, including:

  • Detailed Control Plans for Wuhan Main Urban Area (65 zones)
  • New Town Group Control Plans (155 zones)
  • East Lake Scenic Area Master Plan
  • Municipal infrastructure corridor plans

Managed by Wuhan Planning Bureau, it dynamically updates per national/local regulations.

Access:
http://whonemap.zrzyhgh.wuhan.gov.cn:8020/
(Note: The site uses HTTP instead of HTTPS)

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QGIS 4.0 Roadmap Unveiled: Major Qt6 Migration Scheduled for October Release

The QGIS development team has officially announced plans for QGIS 4.0, with an expected release in October 2025 following QGIS 3.44. This major update centers on modernizing the platform's core infrastructure.

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Gary Sherman: The Godfather of Open-Source GIS and the Birth of QGIS

Recently in the MalaGIS discussion group, we debated the seemingly stagnant development of GIS and the career paths for GIS professionals. Honestly, I too feel uncertain. Coincidentally, I came across a 2018 interview with the founder of QGIS. I've translated it below, hoping it offers insight to readers.

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Implementing Lightweight Choropleth Mapping with Colormap.js

When creating thematic maps in ArcGIS or QGIS, thematic coloring (choropleth mapping) is a common technique where different regions are colored according to their data values, revealing spatial patterns. Recently, our management requested integrating this functionality into our business system. While we could publish pre-rendered maps from ArcGIS/QGIS through servers like GeoServer, this lightweight feature doesn't warrant heavy infrastructure. Instead, I explored coloring GeoJSON features directly and discovered colormap - an elegant solution.

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