[Qgis-user] Shapefile symbology no longer working when zoom in

[Andreas Neumann]

Hi Andrew,

Maybe it is worth a try to recreate the spatial index? Maybe it has defects
or is incompatible. Just remove the .shx files and recreate them with QGIS
in the layer properties --> Source tab.

Maybe it helps,
Andreas



On Thu, 28 Nov 2024 at 18:05, Andrew Chapman via QGIS-User <
qgis-user at lists.osgeo.org> wrote:

> Hi
>
>
>
> My first thought has been  Scale Dependant Visibility but I confirmed that
> it was off. However, text displays ok when I zoom in but the symbology
> lines or points vanish – I don’t think one could do this with SDV without
> two instances of the same layer and different styling.
>
>
>
> The suggestion of trying an earlier version of QGIS may be worth
> investigating. I’m returning to QGIS now because we’ve had very bad
> flooding (again) but I haven’t been involved for the last five years due to
> health issues. A wrecked computer and finding that all the backups hadn’t
> been 100% is rather complicating matters.
>
>
>
> I’ve found old QGIS setup exe files from 2013 and 2014 which I haven’t
> tried to run yet as I’m not sure if they would load an earlier version in
> parallel with my later version.
>
>
>
> Also, as the problem is associated with shapefiles, are there any
> suggestions as to how then could be “sanitised”? It seems the problem files
> are layers that I have created with earlier versions of QGIS while similar
> aged ones that I’ve downloaded from Ordinance Survey work fine.
>
>
>
> Andrew
>
>
>
> *From:* Karl Magnus Jönsson [mailto:Karl-Magnus.Jonsson at kristianstad.se]
> *Sent:* 28 November 2024 14:59
> *To:* Richard McDonnell; Andrew Chapman; qgis-user at lists.osgeo.org
> *Subject:* Sv: [Qgis-user] Shapefile symbology no longer working when
> zoom in
>
>
>
> Hi!
>
> Which old version are you migrating from? Could be worth trying some
> intermediate version of QGIS. Open and save and then go to 3.40.
>
>
>
> Kind regards
>
>
>
> *Karl-Magnus Jönsson*
>
>
>
> *Från:* QGIS-User <qgis-user-bounces at lists.osgeo.org> *För *Richard
> McDonnell via QGIS-User
> *Skickat:* den 28 november 2024 15:07
> *Till:* Andrew Chapman <andrew.chapman at donkagen.co.uk>;
> qgis-user at lists.osgeo.org
> *Ämne:* Re: [Qgis-user] Shapefile symbology no longer working when zoom in
>
>
>
> Hi Andrew,
>
> Sounds like you have set *Scale Dependant Visibility*, setting a *Min* or *Max
> Scale* in the *Symbology* or *Rendering* on the *Layer Properties*
>
> That would be my first port of call anyway.
>
> Kind Regard’s,
>
>
>
> Richard
>
>
>
>
>
>
> *——*
> *Richard McDonnell MSc GIS, FME Certified Professional*
> *Flood Risk Management - Data Management*
>
> ——
> *Oifig na nOibreacha Poiblí*
> Office of Public Works
>
> *Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 *
> Jonathan Swift Street, Trim, Co Meath, C15 NX36
> ——
> M +353 87 688 5964 T +353 46 942 2409
> https://gov.ie/opw
>
> ——
> To send me files larger than 30MB, please use the link below
> https://filetransfer.opw.ie/filedrop/richard.mcdonnell@opw.ie
>
> Email Disclaimer:
> https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/
>
> *From:* QGIS-User <qgis-user-bounces at lists.osgeo.org> *On Behalf Of *Andrew
> Chapman via QGIS-User
> *Sent:* 28 November 2024 13:38
> *To:* qgis-user at lists.osgeo.org
> *Subject:* [Qgis-user] Shapefile symbology no longer working when zoom in
>
>
>
> I’ve not used QGIS for a number of years and now returned to version
> 3.34.0. With projects that worked ok with earlier versions I find that some
> shapefiles now only partially work when I zoom in. Text labels continue to
> work but sybology markers (point and line) vanish when I zoom to scales
> below about 1:10000.
>
>
>
> I’ve tried Vector->Geometry Tools->Check Validity but the problem still
> exists.
>
>
>
> Any suggestions?
>
>
>
>
>
> Andrew Chapman
>
>
>
>
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-- 

--
Andreas Neumann
QGIS.ORG board member (treasurer)
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