[QGIS-Developer] Shapefile not correctly shown in some areas.

[Colin Sare-Soar]

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