Timeline for Managing large data files, vector and raster, in QGIS 3
Current License: CC BY-SA 4.0
17 events
| when toggle format | what | by | license | comment | |
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| Sep 13, 2019 at 0:35 | history | reopened |
KHibma csk MrXsquared xunilk user2856 |
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| Sep 12, 2019 at 20:49 | history | edited | csk | CC BY-SA 4.0 |
deleted 1 character in body
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| Sep 12, 2019 at 17:12 | comment | added | John | In addition to the suggestions to build a spatial index for vectors and pyramids for rasters , you might check out Settings - Options - Rendering for some settings that affect rendering speed. You can generalize/simplify vectors like contours (those from LiDAR are often quite noisy) as well. If you have rasters with complex symbology, especially 32 bit floating point, converting them to rendered 8 bit can greatly improve speed. If you have complex labeling expressions, masking or locations, or complex symbology expressions or symbols, those can slow drawing. | |
| Sep 12, 2019 at 16:45 | review | Reopen votes | |||
| Sep 13, 2019 at 0:40 | |||||
| S Sep 12, 2019 at 16:25 | history | suggested | vinh | CC BY-SA 4.0 |
Convert to object question
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| Sep 12, 2019 at 15:54 | comment | added | vinh | You could try creating a geopackage. This uses a sqlite database and can include optimisations for both vector (spatial index) and raster (overviews and internal tiles). | |
| Sep 12, 2019 at 15:52 | comment | added | vinh | To improve performance of a raster layer in qgis, convert it to a single GeoTiff and add external overviews (fastest) or a virtual raster with external overviews (generally fast). You can create a virtual raster then save it as a GeoTiff. Overviews are created in the properties view (right click the layer). | |
| Sep 12, 2019 at 15:49 | review | Suggested edits | |||
| S Sep 12, 2019 at 16:25 | |||||
| Sep 12, 2019 at 15:10 | history | closed |
GBG Vince LaughU Fran Raga Erik |
Opinion-based | |
| Sep 12, 2019 at 10:41 | answer | added | raaj | timeline score: 0 | |
| Sep 12, 2019 at 10:14 | vote | accept | boberdorf | ||
| Sep 12, 2019 at 9:32 | comment | added | Erik | Do you have access to a server, so you could host your own WMS? Could you reduce the resolution of the DEM/countour layer? What do you mean by "I created both of these of a series of tiled points and created a single file"? Aren't they two files? Why do you actually need hillshade? Would it be feasible to turn on these layers only when you really need them? | |
| Sep 12, 2019 at 6:06 | history | became hot network question | |||
| Sep 12, 2019 at 4:14 | answer | added | Simon GIS | timeline score: 4 | |
| Sep 11, 2019 at 23:32 | answer | added | user2856 | timeline score: 6 | |
| Sep 11, 2019 at 21:30 | review | Close votes | |||
| Sep 12, 2019 at 15:10 | |||||
| Sep 11, 2019 at 20:31 | history | asked | boberdorf | CC BY-SA 4.0 |