[Qgis-user] writing vector data for QGIS input from a python script using osgeo ogr

[Mike Flannigan]

As Etienne said, you can use geojson if you want to.
I recommend it.

Create geojson files that look like this:

{
"type": "FeatureCollection",
"crs": { "type": "name", "properties": { "name": 
"urn:ogc:def:crs:OGC:1.3:CRS84" } },

"features": [

{ "type": "Feature", "properties": { "id": 1, "name": "Route 46" }, 
"geometry": { "type": "LineString", "coordinates": [ [ -90.1322030, 
38.9030880 ],  [ -90.1321070, 38.9031320 ],  [ -90.1321180, 38.9032740 
],  [ -90.1322400, 38.9033200 ],  [ -90.1327310, 38.9033390 ],  [ 
-90.1327700, 38.9033720 ],  [ -90.1328080, 38.9034150 ],  [ -90.1328500, 
38.9034620 ],  [ -90.1328940, 38.9035110 ],  [ -90.1329390, 38.9035600 
],  [ -90.1329630, 38.9036120 ],  [ -90.1329790, 38.9036700 ],  [ 
-90.1329930, 38.9037210 ],  [ -94.8775660, 36.8685670 ] ] } }

You can combine them into one file with a comma between them.

Load that file into QGIS and you have tracks that look like this:
http://www.mflan.com/temp/routes_-_svg.svg

It has the added bonus that if you change the file
while QGIS has it open, the next screen refresh will
usually show the change.

Very cool.


Mike



On 1/22/2019 2:24 AM, qgis-user-request at lists.osgeo.org wrote:
> I’d like to write vector line data in lat/lon coordinates to a file that QGIS can read and display.  I have the osgeo ogr module, but can’t see to find the right documentation on how to use it for this simple task.
>
> Thanks,
> Lee