[Qgis-user] adding a simple filled polygon

[Johan De Groote]

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 <bernd.vogelgesang at gmx.de> 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
> > Qgis-user at lists.osgeo.org
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