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 —— Richard McDonnell MSc GIS, FME Certified Professional FRM 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 1 647 6543 https://www.opw.ie —— To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/[email protected] Email Disclaimer: https://www.opw.ie/en/disclaimer/ -----Original Message----- From: Qgis-user <[email protected]> On Behalf Of Shriramana Sharma Sent: 06 January 2020 14:48 To: [email protected] 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 _______________________________________________ Qgis-user mailing list [email protected] List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user _______________________________________________ Qgis-user mailing list [email protected] List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
