Re: [QGIS-Developer] Shapefile not shown correctly in some areas
Hi Andrea, Unfortunately, creating and using a new profile did not affect the issues I mentioned. I will file a report on Github. Kind regards Colin > On 15/01/2024 03:00 +07 qgis-developer-requ...@lists.osgeo.org wrote: > > > Send QGIS-Developer mailing list submissions to > qgis-developer@lists.osgeo.org > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.osgeo.org/mailman/listinfo/qgis-developer > or, via email, send a message with subject or body 'help' to > qgis-developer-requ...@lists.osgeo.org > > You can reach the person managing the list at > qgis-developer-ow...@lists.osgeo.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of QGIS-Developer digest..." > Today's Topics: > >1. Re: Shapefile not shown correctly in some areas > (Andrea Giudiceandrea) > ___ > QGIS-Developer mailing list > QGIS-Developer@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer > Il 14/01/2024 04:56, Colin Sare-Soar via QGIS-Developer ha scritto: > > Regarding my post on this subject, I mentioned that I had no tooltips on > > any of the toolbar icons. > > I tried the Settings/Interface customization menu item to see if > there was a setting in there but the window just freezes. > > Hi Colin, > try if the issue also occurs using a new QGIS user profile [1]. > If the issue also occurs using a new QGIS user profile, then please file > an issue report on the GitHub QGIS source code repository [2]. > > Best regards. > > Andrea > > > [1] > https://docs.qgis.org/latest/en/docs/user_manual/introduction/qgis_configuration.html#working-with-user-profiles > [2] https://github.com/qgis/QGIS/issues ___ QGIS-Developer mailing list QGIS-Developer@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
Re: [QGIS-Developer] Shapefile not shown correctly in some areas
Thanks Andrea for clearing the shapefile question up. I also write my own shapefiles programatically but haven't fallen foul of this particular item. Regarding my post on this subject, I mentioned that I had no tooltips on any of the toolbar icons. I have searched the documantation but can't find any mention of tooltips. Do they go by another name in QGIS? I tried the Settings/Interface customization menu item to see if there was a setting in there but the window just freezes. I cannot scroll down or click on anything. I have only noticed this in the latest version that I have. My system: QGIS version 3.34.2-Prizren QGIS code revision 7d199797fcc Qt version 5.15.3 Python version 3.10.12 GDAL/OGR version 3.4.1 PROJ version 8.2.1 EPSG Registry database version v10.041 (2021-12-03) GEOS version 3.10.2-CAPI-1.16.0 SQLite version 3.37.2 PDAL version 2.3.0 PostgreSQL client version 14.10 (Ubuntu 14.10-0ubuntu0.22.04.1) SpatiaLite version 5.0.1 QWT version 6.1.4 QScintilla2 version 2.11.6 OS version Linux Mint 21.2 Active Python plugins grassprovider 2.12.99 db_manager 0.1.20 MetaSearch 0.3.6 processing 2.12.99 Regards Colin > > Colin Sare-Soar colin.saresoar at terrashape.co.uk > > Fri Jan 12 19:21:21 PST 2024 > > I cannot see the point numbers or any info. The table is blank. > > This is due to the fact the the .dbf sidecar file which stores the > fields names and values has not been provided or has not been created at > all. > > > > Il 12/01/2024 17:11, Aurélie Tisson (BastaPrint) via QGIS-Developer > ha scritto: > > If my viewing area includes the point 1612, I see all > > the points, well aligned, but I cannot click points 1613 and further. > > If I zoom in, or if I move the area and the point 1612 is out of the > > area, I see nothing anymore. > > It looks like this issue is due to the fact that the extent stored in > the .shp and in the .shx files is incorrect. > > As you can see in the Layer Properties / Information dialog window, the > extent stored for such layer is: > > 645765.5000,6860847. : > 645766.3750,6860852. > > The points with Feature ID from 0 to 34 and from 1613 to 2000 are > outside such extent. > > As suggested by Richard, just exporting the layer in a new ESRI > Shapefile layer will write the right extent in the .shp and .shx files > and the issue will not occur using the new layer. > > While I guess there is an issue in the code used to create the ESRI > Shapefile layer, which not correctly updates the extent of the created > layer, I also see some issue in QGIS itself and or in the GDAL/OGR library: > > - QGIS should be less strict and also display the features outside the > stored extent and or warn the user about the incorrect extent > - the "Updade extent" functionality in the Layer Properties / Source > dialog window seems not working, at least for ESRI Shapefile layers > - the "Repair Shapefile" processing algorithm (based on GDAL/OGR > functionality) doesn't repair the incorrect extent stored in the .shx file. > > Best regards. > > Andrea > ___ > QGIS-Developer mailing list > QGIS-Developer@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer ___ QGIS-Developer mailing list QGIS-Developer@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
Re: [QGIS-Developer] Shapefile not correctly shown in some areas.
I loaded the shapefile and found some weird behaviour. I saw a line of points, with a break (presumably your 'hole') but the same as you, I couldn't click on any of them and they disappear. I cannot see the point numbers or any info. The table is blank. I can see from the properties that there are 2001 points but nothing else. I can see the coordinates of the points by right clicking. One problem that I have is that all my tooltips have disappeared. A small window opens but it is blank, so that doesn't help. I could see the line in Google Earth but the points disappeared there also, if I zoomed in too much. My system is: QGIS version 3.34.2-Prizren QGIS code revision 7d199797fcc Qt version 5.15.3 Python version 3.10.12 GDAL/OGR version 3.4.1 PROJ version 8.2.1 EPSG Registry database version v10.041 (2021-12-03) GEOS version 3.10.2-CAPI-1.16.0 SQLite version 3.37.2 PDAL version 2.3.0 PostgreSQL client version 14.10 (Ubuntu 14.10-0ubuntu0.22.04.1) SpatiaLite version 5.0.1 QWT version 6.1.4 QScintilla2 version 2.11.6 OS version Linux Mint 21.2 Active Python plugins grassprovider 2.12.99 db_manager 0.1.20 MetaSearch 0.3.6 processing 2.12.99 Regards Colin Sare-Soar > Hello, > To make things short, I have a device which gathers data in the fields > (hundreds of data per second), and gets the position through a GPS (every > second). > Between 2 GPS positions, I triangulate the positions, so the points are > aligned. > Sometimes, the device "writes" the data so it spends some time doing so, and > it does not gather anything, so I have a "hole". > > Then, to visualize the data, I create a Shapefile, only with Points. > > In one Shapefile, I had some strange points: points that appear on the map, > but are not clickable and disappear when I zoom in too much. I attach the > files ; they can be downloaded here, too: > https://www.grosfichiers.com/sjNC3yx7Kvi > > For instance, in the file I join, the position number 1613 and further are > problematic. If my viewing area includes the point 1612, I see all the > points, well aligned, but I cannot click points 1613 and further. > If I zoom in, or if I move the area and the point 1612 is out of the area, I > see nothing anymore. > > The code to generate the Shapefile has a systematic approach: it takes the > points one after the other, and writes their position by incrementing the > values. So I suspect there is no bug. > In a previous test, the same problem occured BEFORE point 1217 : I could only > see the first points if the area included point 1217. > > Questions: > - can anyone try to see my shapefile and confirm the problem? > - does this bug ring a bell to anyone? > - what may be the problem? > > Thank you very much! > My versions are detailled below. I just updated to the LTR to try to solve > the problem, but the bug exists with the 3.22.7-Białowieża and > 3.28.14-Firenze versions. > > > Aurélie > > > Version de QGIS > 3.28.14-Firenze > Révision du code > b09131c512 > Version de Qt > 5.15.3 > Version de Python > 3.9.5 > Version de GDAL/OGR > 3.8.2 > Version de Proj > 9.3.1 > Version de la base de données du registre EPSG > v10.098 (2023-11-24) > Version de GEOS > 3.12.1-CAPI-1.18.1 > Version de SQLite > 3.41.1 > Version de PDAL > 2.6.0 > Version du client PostgreSQL > unknown > Version de SpatiaLite > 5.1.0 > Version de QWT > 6.1.6 > Version de QScintilla2 > 2.13.4 > Version de l'OS > Windows 10 Version 2009 > > > > > Extensions Python actives > QGeoloGIS > 1.9.0 > db_manager > 0.1.20 > grassprovider > 2.12.99 > MetaSearch > 0.3.6 > processing > 2.12.99 > sagaprovider > 2.12.99 > > > === Previously = > > Version de QGIS > 3.22.7-Białowieża > Révision du code > 5a65627a > Version de Qt > 5.15.3 > Version de Python > 3.9.5 > Version de GDAL/OGR > 3.4.3 > Version de Proj > 9.0.0 > Version de la base de données du registre EPSG > v10.054 (2022-02-13) > Version de GEOS > 3.10.2-CAPI-1.16.0 > Version de SQLite > 3.38.1 > Version de PDAL > 2.3.0 > Version du client PostgreSQL > 13.0 > Version de SpatiaLite > 5.0.1 > Version de QWT > 6.1.6 > Version de QScintilla2 > 2.13.1 > Version de l'OS > Windows 10 Version 2009 ___ QGIS-Developer mailing list QGIS-Developer@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
[QGIS-Developer] Downloads and random languages
I suspect that this is not particularly QGis related. Are you using a VPN? I get this often on various sites. It seems to be the browser that makes this decision, despite me setting everything to English. As for the speed, well that is always variable. I use certain apps that sometimes require heavy downloads like Qt and X-Plane and I also have quite a fast internet connection. I usually end up either choosing a different VPN server or disabling it temporarily. Colin > On 24/09/2023 04:56 +07 qgis-developer-requ...@lists.osgeo.org wrote: > > > Send QGIS-Developer mailing list submissions to > qgis-developer@lists.osgeo.org > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.osgeo.org/mailman/listinfo/qgis-developer > or, via email, send a message with subject or body 'help' to > qgis-developer-requ...@lists.osgeo.org > > You can reach the person managing the list at > qgis-developer-ow...@lists.osgeo.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of QGIS-Developer digest..." > Today's Topics: > >1. Re: Download troubles? Download in the background? > (Vedran Stojnovi?) > ___ > QGIS-Developer mailing list > QGIS-Developer@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer > Hi, > > I believe this reports from users are because of some problem with servers or > website lately. > I also encountered several times lately very very slow download rates even > though I have high bandwidth, optical internet connection (see my speedtest > result: Speedtest by Ookla - The Global Broadband Speed Test). > > The solution for me was to start download again, but I can easily imagine > that users thought that they need to donate to get better download speeds. > From my testing, I got best download speeds from Norbit server. > > One other thing that I noticed lately is that main page (qgis.org) opens a > random language version of website. There is no translation to Croatian so I > expect to get English version, but I get randomly other languages - just > tested it this moment, and I got Italian version - > "https://qgis.org/it/site/;, but lately I've often experienced Hungarian > version a lot, and once or twice, I got a Greek version, although I always > enter "qgis.org" in the address bar. > > Maybe this weird redirection to another language is related to slow download > speeds. > > > čet, 21. ruj 2023. u 16:35 DelazJ via QGIS-Developer > napisao je: > > Hi, > > > > At https://github.com/qgis/QGIS-Website/pull/1184, I made a pull request to > > update the "Thank you" text based on Nick's suggestion (basically, put > > download info in bold and split whole text in many paragraphs). I do not > > feel really comfortable with mentioning support (companies) there, or do I > > not find the right formulation... > > Whoever feels interested in fixing that part of the issue, the source files > > are accessible generally from the "fix me" URL at the bottom of the page or > > under https://github.com/qgis/QGIS-Website/tree/master/themes/qgis-theme. > > > > Regards, > > Harrissou > > > > Le jeu. 21 sept. 2023 à 15:19, Bourdon, Jean-François (DIF) via > > QGIS-Developer a écrit : > > > [Intranet logo] > > > > > > To continue on the topic of donation and support, although I find it > > > strange that someone doing a donation is expecting at the same time to > > > receive special support (donation != license), maybe a precision should > > > be made on the donation page (https://donate.qgis.org/) like: > > > > > > > > > > > > “Please note that making a donation doesn’t grant any additional support > > > than what can be found at the support page > > > (https://www.qgis.org/en/site/forusers/support.html). For any specific > > > need, you might contact one of the numerous companies offering commercial > > > support > > > (https://www.qgis.org/en/site/forusers/commercial_support.html#qgis-commercial-support).” > > > > > > > > > > > > Maybe this same text could be add to the section “What is your benefit > > > supporting the QGIS Development?” for the Sustaining Membership Program. > > > > > > > > > > > > > > > > > > > > > > > > Jean-François Bourdon, ing.f. > > > > > > Analyste en télédétection > > > Direction des inventaires forestiers > > > Ministère des Ressources naturelles et des Forêts > > > 5700, 4e Avenue Ouest, local A-108 > > > Québec (Québec) G1H 6R1 > > > Téléphone : 418 627-8669, poste 704304 > > > jean-francois.bour...@mrnf.gouv.qc.ca > > > mrnf.gouv.qc.ca > > > > > > > > > > > > De : QGIS-Developer De la part > > > de Emma Hain via QGIS-Developer > > > Envoyé : 20 septembre 2023 20:57 > > > À : Nick Bearman > > > Cc : qgis-developer@lists.osgeo.org > > > Objet : Re: [QGIS-Developer]
Re: [QGIS-Developer] How to find pxiels per meter resolution
You want to draw a complex poligon in your application, so how are the points of the poligon defined, what datum etc. There are many utilities to convert from one datum to another, or libraries you could build into your application. > On 23/07/2023 02:00 +07 qgis-developer-requ...@lists.osgeo.org wrote: > > > Send QGIS-Developer mailing list submissions to > qgis-developer@lists.osgeo.org > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.osgeo.org/mailman/listinfo/qgis-developer > or, via email, send a message with subject or body 'help' to > qgis-developer-requ...@lists.osgeo.org > > You can reach the person managing the list at > qgis-developer-ow...@lists.osgeo.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of QGIS-Developer digest..." > Today's Topics: > >1. Re: How to find pxiels per meter resolution (Vedran Stojnovi?) >2. Re: How to find pxiels per meter resolution (Greg Troxel) > ___ > QGIS-Developer mailing list > QGIS-Developer@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer > Hi Gabriele, > > WGS84 is not a projection, it's an ellipsoid - a mathematical model of the > Earth. You are probably talking about the so-called "Plate carrée" projection > where latitudes and longitudes are mapped as X and Y values. > And this is a complicated thing because dX is different from dY (meridians > are ellipses and parallels are circles). > > I would suggest contacting a consultant who is specialized in this area to > point you in the right direction for your custom need. > I can recommend my colleague Dražen Tutić, he is a professional in this area > and did a lot of programming in the context of mapping and projections. > You can see some of his work on > https://www.north2south.eu/map-projections-and-coordinate-reference-systems/ > > You can contact him via: > Linkedin: http://www.linkedin.com/in/drazen-tutic-0975574 > Email: i...@north2south.eu > > sub, 1. srp 2023. u 19:01 Gabriele Ascolese via QGIS-Developer > napisao je: > > > > Hy all, > > > > i'm developing a c++ gis using qgis api. I have a project in wgs84 > > projection. > > > > I need to draw a complex poligon, so i need to find how is the pixel > > resolution per meters, so i can find how many pixel are in 1 meters and use > > this value to draw at real dimension. > > > > How can i find the pixel per meter resolution using QGIS ? I see that > > WGS84 projection use degrees as measure unit..but i need meter. > > > > > > > > Thank you > > > > ___ > > QGIS-Developer mailing list > > QGIS-Developer@lists.osgeo.org > > List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer > > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer > > > -- > Srdačan pozdrav / Kind regards, > Vedran Stojnović. > Vedran Stojnović via QGIS-Developer > writes: > > > WGS84 is not a projection, it's an ellipsoid - a mathematical model of the > > Earth. > > To be pedantic (a virtue :-), WGS84 is a family of specifications,, > which define not only the ellipsoid (same for all in the family, > thankfully), but also the position/orientation of coordinates and a > definition of orthometric height. Included in this, perhaps implicitly > since it is not really about a particular datum, is transforming from > XYZ to LLh. But, agreed that this list of components does not include a > projection to the plane. > > The OP probably meant to say that the data is in the WGS84 Coordinate > Reference System, or that the project projection is WGS84 Web Mercator. > > (I agree that the OP appears to need a consultant.) ___ QGIS-Developer mailing list QGIS-Developer@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
Re: [QGIS-Developer] How does QGIS parses the shapefile so quickly (? ??)
I can't say why QGIS handles Shapefiles so quickly but I do have experience of reading and writing them for myself. I didn't want to use Shapelib - too big and cumbersome so I just added read/write functions to my application and used the ESRI document for reference. It is quite easy to follow but you have to be careful with the endian-ness of the different fields. Just search for 'ESRI Shapefile format' and you should find their document. > On 28/03/2023 02:00 +07 qgis-developer-requ...@lists.osgeo.org wrote: > > > Send QGIS-Developer mailing list submissions to > qgis-developer@lists.osgeo.org > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.osgeo.org/mailman/listinfo/qgis-developer > or, via email, send a message with subject or body 'help' to > qgis-developer-requ...@lists.osgeo.org > > You can reach the person managing the list at > qgis-developer-ow...@lists.osgeo.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of QGIS-Developer digest..." > Today's Topics: > >1. How does QGIS parses the shapefile so quickly (? ??) >2. Re: How does QGIS parses the shapefile so quickly > (Alessandro Pasotti) >3. Re: How does QGIS parses the shapefile so quickly (Even Rouault) >4. Re: How does QGIS parses the shapefile so quickly (Werner Macho) > ___ > QGIS-Developer mailing list > QGIS-Developer@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer > Dear All, > Sorry to interrupt, I'm newer to QGIS, whe I use QIGS, I find that it is so > quick for QGIS to parse shapefile even it is a very big file, I try to decode > the file by my own with shapelib library, but the result is disappointed, I > try to learn it by myself with QGIS source code but failed, so anyone can > help point the entry of decoding process? > > Thanks.Hi, > > QGIS is using the GDAL/OGR library to read the shapefiles. > > On Mon, Mar 27, 2023 at 9:51 AM 余 绍健 via QGIS-Developer > wrote: > > > > Dear All, > > Sorry to interrupt, I'm newer to QGIS, whe I use QIGS, I find that it is > > so quick for QGIS to parse shapefile even it is a very big file, I try to > > decode the file by my own with shapelib library, but the result is > > disappointed, I try to learn it by myself with QGIS source code but failed, > > so anyone can help point the entry of decoding process? > > > > Thanks. > > ___ > > QGIS-Developer mailing list > > QGIS-Developer@lists.osgeo.org > > List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer > > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer > > > > -- > Alessandro Pasotti > QCooperative: www.qcooperative.net > ItOpen: www.itopen.it > > > Le 27/03/2023 à 10:06, Alessandro Pasotti via QGIS-Developer a écrit : > > Hi, > > > > QGIS is using the GDAL/OGR library to read the shapefiles. > which uses shapelib > > > > On Mon, Mar 27, 2023 at 9:51 AM 余 绍健 via QGIS-Developer > > wrote: > >> Dear All, > >>Sorry to interrupt, I'm newer to QGIS, whe I use QIGS, I find that it > >> is so quick for QGIS to parse shapefile even it is a very big file, I try > >> to decode the file by my own with shapelib library, but the result is > >> disappointed, I try to learn it by myself with QGIS source code but > >> failed, so anyone can help point the entry of decoding process? > >> > >> Thanks. > >> ___ > >> QGIS-Developer mailing list > >> QGIS-Developer@lists.osgeo.org > >> List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer > >> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer > > > > > -- > http://www.spatialys.com > My software is free, but my time generally not. > > > Hi! > Just to add some side information regarding Shapefiles: > (ignore it if understanding shapefiles ist a must in your case) > > http://switchfromshapefile.org/ > > ;) > regards > Werner > > On Mon, Mar 27, 2023 at 5:16 PM Even Rouault via QGIS-Developer > wrote: > > Le 27/03/2023 à 10:06, Alessandro Pasotti via QGIS-Developer a écrit : > > > Hi, > > > > > > QGIS is using the GDAL/OGR library to read the shapefiles. > > which uses shapelib > > > > > > On Mon, Mar 27, 2023 at 9:51 AM 余 绍健 via QGIS-Developer > > > wrote: > > >> Dear All, > > >> Sorry to interrupt, I'm newer to QGIS, whe I use QIGS, I find that it > > >>is so quick for QGIS to parse shapefile even it is a very big file, I try > > >>to decode the file by my own with shapelib library, but the result is > > >>disappointed, I try to learn it by myself with QGIS source code but > > >>failed, so anyone can help point the entry of decoding process? > > >> > > >> Thanks. > > >> ___ > > >>
