Hello Bernard, Thanks. I found it eventually. First the pencil and then the "amoeba" to add a polygon. Then capturing the points and with the vertex tool editing them in the list to get the points at the required place.
After all this was reasonably easy. This is a tool I'll use more. I'm aware that I have a lot to learn about coordinate systems and projections. But the equipment we use gives us WGS84. So that is what I use. And the required precision isn't that taxing. We are on board of vehicles and get a point every second. So running at 70 km/h is about 20 meters between points. I take it that the error between a cilindrical projection and WGS84 is below that. Thanks again, Johan On Fri, 17 Dec 2021 12:04:18 +0100 Bernd Vogelgesang <[email protected]> wrote: > Hi, > > from what I understand, you just need to make your new layer editable > (pencil symbol), then you can see the symbol for adding a polygon. > > Besides that: Be aware that the original coordinate system of GPS points > is EPSG 4326 (unit degrees), and so is the default CRS for layers in > QGIS. In case you want to do more sophisticated operations later with > your data, you should reproject them to a local metric coordinate > system. Tricky topic for beginners. The toolbox is your friend. > > Cheers, > > Bernd > > Am 17.12.21 um 11:10 schrieb Johan De Groote: > > Hello, I'm new to QGIS (and gis in general). For the job I need to make > > events logged form a GPS visible on a map. The events are when we enter or > > leave a zone defined as a polygon. > > > > I managed to get the openstreet view in the background and each type of > > events (entering and leaving) on a separate layer. This worked fine > > following a tutorial I found on the net. Just what I need. > > > > But now I want to enter the zones. These are defined as polygons with each > > cornerpoint defined by GPS coordinates. I have already set those points on > > a separate layer. Now I read the handbook but it is not very clear. It > > starts with adding a new shape layer (ok). But then it gets very muddly for > > me. I tried a tutorial but this is for older versions of QGIS (just as the > > training manual on the QGIS website) and they talk about "click the add a > > polygon icon" which isn't to be found. > > > > So is there somewher a tutorial on how to add a filled polygon on a map > > when you have the points as GPS coordinates? I can add the polygon > > capturing the points on the map, that kind of precision is acceptable for > > my needs. > > > > Thanks, > > Johan > > > > Using: > > > > QGIS version > > 3.22.0-Białowieża > > QGIS code branch > > Release 3.22 > > Qt version > > 5.15.2 > > Python version > > 3.9.9 > > GDAL/OGR version > > 3.3.3 > > PROJ version > > 8.2.0 > > EPSG Registry database version > > v10.038 (2021-10-21) > > GEOS version > > 3.10.0-CAPI-1.16.0 > > SQLite version > > 3.35.5 > > PostgreSQL client version > > No support > > SpatiaLite version > > 5.0.1 > > QWT version > > 6.1.5 > > QScintilla2 version > > 2.11.6 > > OS version > > Gentoo/Linux > > _______________________________________________ > > Qgis-user mailing list > > [email protected] > > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user _______________________________________________ Qgis-user mailing list [email protected] List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
