survgr

A django project for transforming coordinates between the various Coordinate Systems used in Greece. You can try the app at https://www.survo.gr

It is (will be for the time being) a website / web api for transforming earth point coordinates and other geometries between:

GGRS87 / TM87 (EPSG:2100 and EPSG:4121)
Old Greek Datum (EPSG:4815)
Various HATT projections with respect to the Old Greek Datum using the published coefficients by OKXE
TM3 zone projections with respect to the Old Greek Datum
ED50 / UTM (EPSG:4230, EPSG:23034, EPSG:23035)
WGS84 (EPSG:4326)
The new HTRS07 / TM07 using the accurate transformation published by Hepos

Prerequisites:

To install and run the project locally:

Make a fresh python 3 virtual environment
pip install -r requirements.txt for the back-end dependencies
Add a simple text file named ".env" with some environment values for
- DJANGO_SECRET_KEY=addasecretkeyhere
- DATABASE_URL=sqlite:///survgr.db
- SURVGR_DEBUG=True
python manage.py migrate to create an sqlite db with some initial data
Run python manage.py test for testing
Prepare the front-end:
- cd frontend
- npm install to install front-end dependencies locally
- npm run build to build the front-end files
- or npm run watch to run the front-end server
Run python manage.py collectstatic
Run python manage.py runserver to run the back-end server

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