Linked Questions

12 votes
1 answer
27k views

Repairing geometry using QGIS? [duplicate]

I have shapefile with few polygons. Some of them are self-intersecting. In ArcMap I can use "Repair geometry" tool, and it works well. But problem is, that for that task some users need to use open ...
risk_ltu's user avatar
  • 329
2 votes
1 answer
138 views

Intersecting to vector layers when there is no common attribute [duplicate]

I am trying to join two vector layers into one, the first is a road noise barrier shapefile, the second is a vectorised DEM. The road barriers have a relative height attribute for each section of ...
nashm999's user avatar
  • 317
0 votes
0 answers
102 views

Is there a tool that is similar to the ArcGIS repair geometry tool in QGIS? [duplicate]

I need a tool in QGIS that has the same functionality as the repair geometry tool (native of ArcGIS).
Diogo Caribé's user avatar
0 votes
0 answers
49 views

Repairing geometry using QGIS [duplicate]

I'm looking for a roughly equivalent tool in QGIS to the Repair Geometry Tool in ArcGIS Desktop. When I run some common vector processing tools in QGIS, I occasionally run into invalid geometry errors ...
Nicole's user avatar
  • 19
10 votes
7 answers
24k views

Fixing corrupt shapefile?

I have a shapefile that I was working on in ArcGIS Desktop 9.3 get corrupted somehow and it gives me the error "Number of shapes does not match the number of table records.". What I would want is to ...
Erick's user avatar
  • 873
12 votes
4 answers
36k views

QGIS: "Invalid geometry" even after using validity checker and v.clean

I'm trying to intersect two layers in QGIS, similar to this unanswered question. I've performed Vector > Geometry Tools > Check Geometry Validity and I've run GRASS's v.clean, per these questions. I'...
snadhelta's user avatar
  • 123
6 votes
2 answers
8k views

How to to validate geometries using ogr2ogr

I have been trying to dissolve a shapefile with more than 38000 rows. I used query as follows ogr2ogr -f "ESRI Shapefile" dissolved.shp Barangays.shp -dialect sqlite -sql "select ST_union(Geometry),* ...
AMahajan's user avatar
  • 188
1 vote
2 answers
5k views

Add ring and Fill Ring error: could not add ring since the inserted Ring is not contained in a feature

I'm new to QGIS and am struggling a bit, I'm using the 2.18 version on a Mac OSX Yosemite. I'm trying to add a ring to create a geological map, I was successful for most of the map, but suddenly it ...
FIAMMA BORGNI's user avatar
3 votes
2 answers
3k views

Cleaning polygon after using dissolve to repair geometry in QGIS?

I'm trying to obtain the boundaries of shapefile, thus to clean the inside as a matter of speaking. While I had expected that dissolve while get me a proper polygon, unfortunately it still has some ...
Geosphere's user avatar
  • 763
4 votes
1 answer
2k views

QGIS: Feature passes ‘Check validity’ but ‘Fix geometries’ has an issue - where to start?

I think I have a problem in understanding how the ‘Identify Features’ tool works in QGIS with a shapefile that might have some kind of error. I don’t know quite enough QGIS to be sure I’m asking this ...
Erik Paulson's user avatar
1 vote
1 answer
3k views

Overlap of raster over a vector in QGIS

I have a single band raster image with values of pixel 0 and 1. There's another line vector layer over the same area. I need to find the percentage of line which is overlapped by the pixels of value 1....
Kuljeet Keshav's user avatar
3 votes
1 answer
2k views

How do I find the percent overlap between two shapefiles in QGIS?

I have two different shapefiles (first and second). I want to calculate how much overlap there is between the liquefaction zones in the second shapefile and each of the neighborhoods in the first. I'...
Sebastian's user avatar
  • 255
3 votes
2 answers
453 views

QGIS Spatial query error

I have a layer of a csv file with around 700k rows and a polygon layer, both are in wgs84. I'm trying with the spatial query to calculate what point are in the polygons. The problem is that the ...
Tobbe's user avatar
  • 611
3 votes
2 answers
790 views

Spatial query that doesn't seem to work

I have QGIS 2.8.2 Wien on windows 7 and quite new to QGIS. I have two shapefiles - 1 with rivers and 2 with sites located on some of those rivers. I want to carry out a spatial query to find the river ...
lynda's user avatar
  • 39
3 votes
2 answers
550 views

Calculating polygon area fail — QGIS

I'm trying to calculate the area of US congressional districts (shapefiles from here). I have eight different district shapefiles. I can calculate areas perfectly for the first five shapefiles (...
Macaulay's user avatar

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