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Questions tagged [qgis-2]

Version 2.x of QGIS (previously Quantum GIS)

Questions specifically related to version 2.x of the Quantum GIS / QGIS open source application.

818 questions
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How to delete duplicate nodes/points in QGIS?

I'm new to this site and most impressed with the help available. I have a question regarding removal of duplicate points which has been asked before. However the QGIS solutions suggested do not appear to work for me. I'm using QGIS 2.0.1. I have a…
DirkB
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Red x marks along lines after adding a length field?

I added a "length" field to a shapefile of lines called "roads". QGIS puts red x's along the length of the road afterward. Why is this, and can I make these go away?
Jason
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Qgis 2.8.9-Wien Attribute table Update Fields Error

I can't update fields in the Attribute table. I get an error when I select Update All and Update Selected: An error occurred while evaluating the calculation string: No root node! Parsing failed? Instead I have to open Field Calculator/Select the…
Ben Jones
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2 answers

Calculating tortuosity in QGIS 2.18.27

I am struggling on how to calculate tortuosity in QGIS. My data includes numerous lines (the mapping of animal trails) I have tried calculating tortuosity with the field calculator but had no luck is there a plugin that I need to use or have I just…
Alison Jones
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2
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How to display seismic lines from CSV?

I wish to display land seismic lines on a map. Land seismic lines are often not straight so often there is survey data for each shotpoint or every 5 shotpoints. Typically a shotpoint (SP) could be 25m or 50m apart. There are often many hundreds of…
user27129
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1 answer

qgis ver 2.0 vector layers not visible over raster

This seems like a simple thing, but I cannot get it to work in 2.01. I've done it extensively in 1.8. I have vector line layers and raster layers. I put the vector line layer in order "above" or on top of the raster, but the lines do not display. If…
user24073
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Uninstall QGIS 2.18 from mac and reinstall. Remembers settings

Relates to Mac OS 10.14. I have problems with QGIS 2.18. Plugins not working etc. (latest problem is not being able to make a virtual raster catalogue of landsat 8 tiles. Error message : "The process failed to start. Either the invoked program is…
charlie mike
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Batch import 100 tif images into QGIS

I want to import 100 tif images into QGIS. For each tif I have to click 'OK'. Is it possible to batch import all 100 without clicking ok every time?
sadananda patnaik
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How we see all features of plugins in qgis 2.8.1?

I have installed Qgis 2.8.1 but in plugins not installed, upgradable are not display. how we add new plugin?
A Dutta
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Dragging Vertices in QGIS Edit

I am attempting to edit a linear feature layer and need to drag vertices at node endpoints to connect across slight gaps. In ArcMAp, it was possible to lock onto a vertex and drag it to a new position. Does QGIS offer similar functionality? I am…
Steve Miller
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Mapping variation within multiple categories using QGIS?

I am learning qgis and running into a problem. Here is what I want to do. I have county data. It falls into 4 types. Each type includes a discrete set of counties, that does not overlap with the other types. Within each set, counties are…
ameyers
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How do I programmatically automate "Random Points" in QGIS?

The random point tool in QGIS 2.4 works perfectly fine through the GUI, but I can't figure out how to automate this tool via Python and/or the modeller. Specifically, under the menu items: Vector | Research Tools | Random points, I am able to create…
Prophet60091
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Creating a graduated buffer in QGIS

I'm attempting to map cell phone towers and their range in QGIS. I'm wondering if it's possible to create buffers which change color intensity according to their distance from a central point. The buffer color is most intense at the center and…
user35310
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QGIS 2.2: Rotated labels not possible any more?

Using Qgis Valmiera I would like to create feature labels on a layer that are rotated with a rectancular whitish background. Using "Labels (deprecated)" and entering an angle does the first part of it but I can't make a rectangular backgound. The…
tanGIS
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How to add randomly distributed points within boundaries of zip codes?

I’m creating a map to show the distribution of students in my school’s department. I have a .shp file from the US Census displaying zip code areas in the vector layer. Now I have an Excel spreadsheet that lists how many students are in each zip code…
user27894
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