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opengisch / QField

A simplified touch optimized interface for QGIS
http://www.qfield.org
GNU General Public License v2.0
831 stars 227 forks source link

Bug in the CRS conversion #1122

Closed armsilva closed 4 years ago

armsilva commented 4 years ago

Hello,

In my QGIS project I created two columns to give me the coordinates of latitudes and longitudes in degree, minute, second, for which I used the expression "to_dms (x (transform ($ geometry, 'EPSG: 3763', 'EPSG: 4937 ')),' x ', 1,' suffix ') ", since the project is in projected coordinates SRC 3763 (I replace x with y in the expression for latitude). On the PC it works perfectly and automatically returns the correct coordinates, but on the tablet, through QField it presents "stupid" results, with longitudes like 50º. When I repeat the creation of the same point, then it is able to appear 30º and then 40º ... I think Qfield must have a bug in the SRC conversion.

m-kuhn commented 4 years ago

Thanks for reporting. Can you add the QField version you are using and a test project?

armsilva commented 4 years ago

Hello!

I'm using QField "1.5.3 - Piz Palu".

You can see the problem in the fields "long" and "lat". The CRS i am using are portuguese CRS's. In QGIS everything is allright. However, in QField it´s not. test.zip

Thanks,

m-kuhn commented 4 years ago

Can you try with the latest release (https://download.opengis.ch/qfield/ci-builds/qfield-dev--6b6d11cef77e81cee160a327ecc036c33ca3bd50-arm64_v8a.apk)? It likely has fixed the problem.

armsilva commented 4 years ago

Hi m-kuhn,

I have now installed this version and the problem is solved. Everything is already working perfectly. Thank you!

m-kuhn commented 4 years ago

@armsilva Credits go to @arbkey who sponsored this fix. If you want to show your appreciation, send a mail to https://arbkey.com/ :-)

mygiano commented 8 months ago

i have kinda same problem, in QGIS the layer shown perfect, in Qfield also working as QGIS, until recently not show anything and list no feature. Layer name "Polaruang_Sitaro.gpkg". Qfield message log : CRS Transform Error caught: forward transform of (inf, inf) Error: Fallback transform failed. Project sync via Qfieldcloud (Community Project name KRK-KKPR, user : ckpu-sitaro) Qfield version 3.1.9 QGIS LTR 3.22

[Uploading KRK-KKPR_cloud.zip…]()