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📖 S_0604-374 Dataset Documentation

Dataset Overview: Vector tile dataset converted from Esri File Geodatabase to PMTiles format

🗂️ File Structure

a.pmtiles - PMTiles file with all layers merged
index.html - Interactive map viewer
style.json - Style definition for MapLibre GL
docs/ - Documentation folder

📊 Data Details

Source: src/S_0604-374.gdb
Number of Layers: 19 layers
Data Format: Esri File Geodatabase → PMTiles
Coordinate System: Preserved from source data
Zoom Levels: 0-14

🗺️ Included Layers

administrativeBoundaryArea
Administrative Boundary Area (Corrected)

artificialCoverage
Artificial Coverage

building
Buildings

contourLine
Contour Lines

facility
Facilities (Points)

geodeticReference
Geodetic Reference Points

geographicalNames
Geographical Names

linearfacility
Linear Facilities

linearTopographicFeature
Linear Topographic Features

linearWaterFeature
Linear Water Features

pointTopographicFeature
Point Topographic Features

roadArea
Road Areas

roadAreaattribute
Road Area Attributes

roadCenterLine
Road Center Lines

structures_ln
Structures (Lines)

structures_pt
Structures (Points)

supplementaryRoadLine
Supplementary Road Lines

vegetation
Vegetation (Corrected)

waterSurface
Water Surface

Note: Some layer names in the source data had spelling errors. The following corrections were made during conversion:

administrtiveBoudaryArea → administrativeBoundaryArea
vegitation → vegetation

🛠️ Technical Specifications

Conversion Pipeline

ogr2ogr -f GeoJSONSeq → jq (tippecanoe properties) → tippecanoe → PMTiles

Tools Used

ogr2ogr: GDAL's vector data conversion tool
jq: JSON processing tool (for adding tippecanoe properties)
tippecanoe: Vector tile generation tool
MapLibre GL: Web mapping rendering library

tippecanoe Options

--maximum-zoom=14
--minimum-zoom=0
--drop-densest-as-needed
--extend-zooms-if-still-dropping
--force

🌐 GitHub Pages

This dataset is hosted on GitHub Pages and is directly accessible on the web. The PMTiles file supports efficient streaming access, downloading only the necessary parts.

📱 How to Use

View the interactive map on the main page
Toggle layers on/off
Zoom in/out to explore data details
Use location services to display your current location

Performance: The PMTiles format allows for fast display of large vector datasets.

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