[Qgis-user] Restricting project extent in QGIS

[Richard McDonnell]

Hi,
Im not sure what format your vector layers are in, but if you are dealing with a large layer, then you could look at uploading to something like PostGIS, you could then apply a filter when adding the layer to only load data in your area of interest.

You could also look at using a filter on your existing datasets, one further thing you can look at is using Zoom Levels (Scale range) to stop the rendering of data beyond a certain zoom level, only allowing you to view the data at certain levels.
Regard's,

Richard McDonnell






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-----Original Message-----
From: Qgis-user <qgis-user-bounces at lists.osgeo.org> On Behalf Of Shriramana Sharma
Sent: 06 January 2020 14:48
To: qgis-user at lists.osgeo.org
Subject: [Qgis-user] Restricting project extent in QGIS

Hello.

I am using QGIS 3.4 LTS on Kubuntu Bionic LTS. I am using several global datasets like NaturalEarth, HydroRIVERS etc. Loading all of them takes too much time and memory especially on my laptop.

I am mostly working in India area only. So I'd like to apply some settings in my project to tell QGIS to load features from within India only for performance reasons. It is acceptable to have it as a lat/lon extent constraint rather than clipping to a polygon.

There is existing advice on how to clip data to given polygons
(https://guides.library.duke.edu/QGIS/Clip) but I don't want to maintain separate shapefiles etc with clipped data. So I'd prefer to set it in the project using global upstream data.

https://gis.stackexchange.com/questions/277297 seems to indicate that this is possible in ArcGIS. But how can I achieve this in QGIS?

--
Shriramana Sharma ஶ்ரீரமணஶர்மா श्रीरमणशर्मा 𑀰𑁆𑀭𑀻𑀭𑀫𑀡𑀰𑀭𑁆𑀫𑀸
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