TommyGeoreferencing High Resolution Raster from Vector PDF using QGIS and GDALRecently I am working for a project that requires georeferencing site plan vector PDF and export as high resolution raster (GeoTIFF /…3 min read·Jun 20, 2022----
TommyCopy and Paste Georeference Data using GDALRecently I am working for a project that requires “copy & paste” georeference data of between identical raster file, varying format (TIFF…3 min read·Jun 18, 2022----
TommyVisualization of HK 3D Pedestrian Network Data with deck.glHK Gov Lands Department released 3D Pedestrian Network (3DPN) data to public, which the dataset is very useful for pedestrian navigation…3 min read·May 17, 2022----
TommyExtract Drone Photos Exif Data to JSON using ExifTool and PythonI had lots of drone photo, and I want to visualize the geolocation record (latitude, longitude, altitude) and orientation in map. These…1 min read·May 7, 2022----
TommyVisualize Drone Photos Location and Orientation in deck.glExif data inside drone photos provides plenty of information, including location, altitude and rotation angles, which it helps indexing /…5 min read·May 6, 2022----
TommyGenerate XYZ Tiles in QGIS and Serve on the InternetPreviously I mentioned the performance bottleneck in leaflet.js imageOverlay. So I had georeferenced the images and, in this article I will…4 min read·May 4, 2022--1--1
TommyGeoreferencing for HK Constructions Plan using QGISI am interested in HK infrastructures development since I live in HK, I did read plan documents a lot and really enjoy it!5 min read·May 4, 2022--2--2
TommyHK Spot Height Data: From GML to GeoJSONLandsD provides plenty of information in their digital map, which is not released in Geoinfo Map or explicitly in open data. You may read…4 min read·May 4, 2022----
TommyPathfinding API from HK Transport DepartmentTransport Department recently released “TRAFFIC DATA FROM TRAFFIC DATA ANALYTICS SYSTEM” API. The API is quite easy to use, simply…4 min read·May 3, 2022----
TommyPathfinding Visualization using FoliumPreviously, I used lxml and networkX to building simple pathfinding solution from HK road network data. Since I use Jupyter Lab in the…2 min read·May 3, 2022----