Re: [Qgis-user] results Measure Tool vs. length()

$length gives the same result as length($geometry) Michel Van: Springfield Harrison [mailto:stellar...@gmail.com] Verzonden: vrijdag 18 mei 2018 2:52 Aan: Michel Stuyts CC: qgis-user Onderwerp: Re: [Qgis-user] results Measure Tool vs.

Re: [Qgis-user] results Measure Tool vs. length()

Thank you very much for the explanation. When I use length(transform($geometry,layer_property(@layer_id,'crs'),'EPSG:31370')) in Belgium the results are very similar to the result of the Measure Tool, but if use this expression in New York the result is different from the result of the

Re: [Qgis-user] results Measure Tool vs. length()

Hi Michel, Never use epsg 3857 for measurement beacuse it is not a "projection"... this "pseudo projection mercator" 3857, called often "Popular Visualisation " is pseudo Because only use for visualization applications. example in France : 3200 km for a road for example, instead of 2100

Re: [Qgis-user] Problem georeferencing images in UTM

Hi Carlos: I georeferenced 2 screen shots of your maps and obtained good results.  I would have a close look at the coordinates of your ground control points and make sure you selected the utm grid intersection as a control point versus the corner of the mapsheet which is a lat/long grid. It

Re: [Qgis-user] results Measure Tool vs. length()

Maybe I misunderstood your question, but you *should* expect different length, area and direction calculations when converting from one projection to another. Every projection distorts. Either distance, area, or direction, or some combination. A local projection is

[Qgis-user] Transformator between 32 and 64 bit version od projekt file

Denar qgis community, i use the same version of qgis in portable and laptop comp. with diffent sistema - portable is 32 bits, laptop 64. Accidenty i used project file prepared by 32 bit system and saved it. Now it is unpossible to open it in portable computer. Please, any idea how to solve the

Re: [Qgis-user] results Measure Tool vs. length()

a full Technical description of code 3857 epsg (and his trouble about measurement) here : https://alastaira.wordpress.com/2011/01/23/the-google-maps-bing-maps-spherical-mercator-projection/ so long... Julien-Pierre GUILLOUX Chargé de mission Eau, Forêt, Natura

Re: [Qgis-user] Problem georeferencing images in UTM

Hi, NAD27 does touch the northern part of South America but you are correct in saying that it does not extend in Brazil.  I wrote the comments when I was still trying to figure out where the maps were in the world.  I often get problems with NAD27 vs NAD83 grid in Canada as many maps have

[QGIS-it-user] Spezzare geometrie

Ciao a tutti, sto lavorando con un elemento lineare (la traccia di un percorso) che si intreccia in vari punti. Ho bisogno di spezzare in alcune posizioni precise ma quando uso lo strumento "Spezza geometrie" mi spezza la linea in tutti i punti in cui essa si intreccia, cosa che io non voglio

[Qgis-user] Pyqgis3.0 issues

Greetings, I made a script to automate some gis tasks using qgis. I tested the script in the python window in qgis3.0 and I can import it and use it properly. The issue is that I'm having trouble using it outside of qgis I can't seem to get python3 to work properly. For the python3.exe in

Re: [Qgis-user] Problem georeferencing images in UTM

> Le 18 mai 2018 à 00:28, a écrit : > > I haven't been able to open the dataset but going through the discussion I > would like to offer some assistance since I believe there are some > misconceptions here: > > First, the data has nothing to do with

[Qgis-user] Selected features (by attribute) not showing on map as selected

Is there a setting that controls whether features when selected by expression against attribute values, show as highlighted (yellow) or not? I am sure this worked in the past, but no longer does so on my install (2.18). The features when selected by mouse show as yellow on map and selected in

Re: [Qgis-user] Pyqgis3.0 issues

Run py3_env in your osgeo4w shell https://gis.stackexchange.com/a/277842/2856 Luke On Sat., 19 May 2018, 06:55 Alexis R.L., wrote: > Greetings, > > I made a script to automate some gis tasks using qgis. I tested the script > in the python window in qgis3.0 and I can import

[Qgis-user] Bug Reporting

I am trying to register to report a bug in v3 but although I have registered on the QGIS Issue Tracking Page, I continually fail to get a conformation email. Any thoughts on why or who I need to contact? Grant Boxer Perth, Western Australia ___