Ecosyste.ms: Awesome
An open API service indexing awesome lists of open source software.
https://github.com/answerquest/wkt-leaflet-map-template
Template where geodata in WKT CSV form is loaded onto a leaflet map, with basic mouse interactions for interactivity
https://github.com/answerquest/wkt-leaflet-map-template
Last synced: 16 days ago
JSON representation
Template where geodata in WKT CSV form is loaded onto a leaflet map, with basic mouse interactions for interactivity
- Host: GitHub
- URL: https://github.com/answerquest/wkt-leaflet-map-template
- Owner: answerquest
- License: mit
- Created: 2019-09-21T09:57:29.000Z (over 5 years ago)
- Default Branch: master
- Last Pushed: 2020-11-23T03:52:54.000Z (about 4 years ago)
- Last Synced: 2024-10-24T03:28:37.958Z (about 2 months ago)
- Language: JavaScript
- Homepage: https://answerquest.github.io/WKT-Leaflet-map-template/
- Size: 388 KB
- Stars: 0
- Watchers: 2
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
## Intro
A template that others can use, where the following things have been achieved:
- Geo-data file is in CSV WKT format (normal csv, with one column 'WKT' holding the geo-data)
- CSV WKT data is loaded from CSV and rendered on map
- Basic (but difficult to code!) interactions like hover, click are set up
- Any kind of geo data like point, polygon, line, multipolygon etc can be loaded; and multiple kinds can be loaded togther.
### Advantage of WKT:
The data is in a simple table like so:
```
+───────────+─────────+──────────────────────────────────────+
| DISTRICT | D_CODE | WKT |
+───────────+─────────+──────────────────────────────────────+
| Gondiya | 507 | POLYGON ((80.56149 20.82284, ... )) |
| Bhandara | 506 | POLYGON ((80.56149 20.82284, ... )) |
| Jalgaon | 499 | POLYGON ((80.56149 20.82284, ... )) |
+───────────+─────────+──────────────────────────────────────+
```
So you can easily bring in more columns, edit your data, make fixes, combine data from different sources, etc. No need of spending time loading up on GIS software etc. Data management becomes a breeze : just change and save your csv.
### Deploying at your end
- Download and unzip this repo
- No worries, nothing to install. But...
- Since there is dynamic csv loading happening, simply double-clicking the html file isn't going to cut it.
- This folder needs to be deployed on a server. Don't worry, you can easily deploy a "simple portable web server". Search for that on the web - there's many quick apps / command line solutions.
- Once your server is launched, open browser and go to `localhost:8000` or whatever port number the server tells you.
### Getting data in WKT form
- If you have your data loaded up on QGIS, then follow this guide: https://dominoc925.blogspot.com/2018/01/using-qgis-to-export-csv-files-with.html
- You can also search online for "covert KML to WKT" etc.
- Draw your own shapes! https://clydedacruz.github.io/openstreetmap-wkt-playground/
### Libraries used
- **[Wicket](https://github.com/arthur-e/Wicket)** for WKT to geojson conversion
- **[Papa.parse]()** for loading the CSV file as a json array
- **[Leaflet](https://leafletjs.com/)** for the map
### Note on data
Data retrieved from [India 2018 Districts](https://github.com/justinelliotmeyers/INDIA_2018_DISTRICTS) repo.
Processing done: Filtered for Maharashtra-only districts in QGIS, then loaded on [mapshaper.org](http://mapshaper.org) for simplifying, then loaded in QGIS again and saved as CSV with WKT.
Proudly Made In India by [Nikhil VJ](https://nikhilvj.co.in)