[Qgis-user] GPS Points CRS and delete doubles
Hi, after I had imported my points correctly ... over 300.000 points how to equalize / convert the CRS over all layers and have the same visual output? I like CRS 3857 more because (OSM and Google) the map looks better at this CRS. But the more important question for me is how to delete double points not only by coordinate but with use of the timestamp in the same table. Regards. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] GPS Points CRS and delete doubles
"L.W." writes: > after I had imported my points correctly ... over 300.000 points > > how to equalize / convert the CRS over all layers and have the same > visual output? qgis is set up to deal with data being in one CRS and displayed in another. It is normal to use a projected CRS (as you are, or UTM, or some other national/regional plane coordinates) as the project CRS and have data in WGS84 or some national datum. Other than skipping transforms in some cases and causing errors of about a meter due to confusion about WGS84 being a datum ensemble (and your data if from a phone is surely not good enough that you'd notice this, and there is not problem from WGS84 to 3857), this works fine. So just leave the project CRS as you had it, and use the WGS84 codepoint for your data and it should work. > I like CRS 3857 more because (OSM and Google) the map looks better at > this CRS. Sure. all of the lat/lon CRS are awkward because there is distortion since 1E-5 of latitude and 1E-5 of longitude are not the same distance. > But the more important question for me is how to delete double points > not only by coordinate but with use of the timestamp in the same table. I wonder if what you really want is a DP simplification, and surely that must be an option in qgis already. https://docs.qgis.org/3.16/en/docs/user_manual/processing_algs/qgis/vectorgeometry.html#qgissimplifygeometries https://docs.qgis.org/3.16/en/docs/user_manual/working_with_vector/functions_list.html#simplify signature.asc Description: PGP signature ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] GPS Points CRS and delete doubles
But the more important question for me is how to delete double points not only by coordinate but with use of the timestamp in the same table. I wonder if what you really want is a DP simplification, and surely that must be an option in qgis already. maybe, but I think it looks for 1;1 and 1;1 but not for 1;1;07:45 and 1;1;0824, same coordinate but different time. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] GPS Points CRS and delete doubles
On 7/8/2021 6:53 AM, L.W. wrote: But the more important question for me is how to delete double points not only by coordinate but with use of the timestamp in the same table. Take a look at GPSBabel - it has a large number of tools for managing GPS tracks ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] GPS Points CRS and delete doubles
Am 08.07.2021 um 16:11 schrieb David Strip: On 7/8/2021 6:53 AM, L.W. wrote: But the more important question for me is how to delete double points not only by coordinate but with use of the timestamp in the same table. Take a look at GPSBabel - it has a large number of tools for managing GPS tracks hmmm, I do have them as a Geopakage now ... than I have to look how to convert this. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
