Questions tagged [merge]
To combine two or more parts into a larger whole.
155
questions
112
votes
5
answers
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Merging multiple vector layers to one layer using QGIS
I've imported several shapefiles which where exported from a Mapinfo .tab. Several .tab-files are imported resulting in 20+ layers.
Afterwards I want to export it to GeoJSON; but I'm reluctant to ...
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27
votes
4
answers
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views
Merging/Dissolving polygons by Common Attribute Field in QGIS?
I have joined corresponding Local Enterprise Partnerships table data into a polygon shapefile containing UK Local Authorities.
How do I Dissolve or Merge the the Local Authorities polygons by ...
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31
votes
2
answers
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views
Joining several raster files using QGIS?
I'm new to QGIS.
How can I combine multiple raster layers into one layer?
The raster images are of different areas with very little overlap.
The goal is to bring numerous town plats into one ...
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29
votes
5
answers
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views
Merge intersecting polygons into one which are part of the same feature
I'm not a GIS professional so I hope I use the correct wording, at least I hope you understand my question.
Let's say there are five polygons in the feature A. In the shapefile there are
more ...
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25
votes
3
answers
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Merging multiple SpatialPolygonDataFrames into 1 SPDF in R?
I have created 2 polygons in QGIS. Using them in R, polygons become automatically SpatialPolygonsDataFrame (SPDF). I would like to merge them into single SPDF (as is super easy in ArcGis using Tool ...
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16
votes
1
answer
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views
Merging Multiple Tables into New Table in PostGIS
I am looking to merge a number of individual tables into a new table in PostGIS. This is an easy task when working with Shapefile data, but I am unsure how to do this in PostGIS.
I think I use Append, ...
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10
votes
3
answers
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Merge lines with the same 'name' attribute on QGIS?
I have a shapefile with a few thousand lines, each is a street segment. I'd like to merge all features with the same 'streetName' attribute into a single attribute. I only really care about the name ...
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7
votes
2
answers
8k
views
Merge shapefiles using ogr2ogr and retrieve the attributes of both
I have two shapefiles that I want merge (overlay/intersect) having in the destination the attributes of the two sources file.
ogr2ogr file_merged.shp tl_2010_us_uac10_conus_albersUA.shp
ogr2ogr -...
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12
votes
3
answers
19k
views
Measuring performance difference between Merge and Append in ArcGIS Desktop?
Often I find myself in a situation where I don't care whether or not my tool produces a new feature class, but I do care how long it takes to combine all of my large datasets. Does it take longer to ...
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11
votes
3
answers
4k
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How to add vertices to existing linestrings?
If I have
Linestring(1 2, 1 5, 1 9)
and a
Point(1 3)
Is there any function that can merge linestring and point preserving the order
so output would be:
Linestring(1 2, 1 3, 1 5, 1 9)
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8
votes
4
answers
5k
views
Using open source software to merge large shapefiles?
Some background: I have 2 polygon shape files with approximately 500,000 records each. The two files are identical in terms of field structure.
Using ArcGIS 10.0 I can'nt merge these two files using ...
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8
votes
1
answer
5k
views
Merging neighbouring polygons in QGIS
I have a polygon layer that consists of many different polygons; some of them are neighbouring and some of them are not. How could I merge the neighbouring polygons?
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6
votes
3
answers
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views
Merge rasters with different origins in R
I have a list of rasters with the same projection and resolution but different origins and I need to merge them in a single raster file.
Here's my code
l <- list.files('path', full.names=TRUE)
...
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5
votes
3
answers
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views
Merging tif images into a single GeoTiff with QGIS
For this example, I have 3 tif images that are tiles. They fit together to form a single image.
I load the 3 images into QGIS and it merges them directly and I see my completed image.
The problem ...
- 51
3
votes
1
answer
4k
views
How to "Merge Selected Features" with python?
I have been looking for the answer to this question for some time now, but can't seem to find it! My problem is straight forward:
I have one layer
It contains lots of features (only polygons), say ...
3
votes
1
answer
4k
views
Merge shapefiles in folders and subfolders with arcpy
I try to merge 20 shapefiles in order to get one shapefile that include all the features. All shapefiles are called "migrashim", and they spread in big folder that divided to a lot of sub folders. ...
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2
votes
1
answer
3k
views
Merging more than 9 input files with lasmerge?
Is there a possibility to feed more than 9 LAS files to lasmerge tool? The user interface only allows 9 LAS files from LAStools toolboxes in QGIS or ArcGIS, but at liblas.org it’s described as there ...
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1
vote
2
answers
637
views
Merging polygons that share one vertex (node neighbors) using ArcGIS Desktop?
I have a set of very large shapefiles and would like to merge polygons within these that share one vertex.
Currently they are all separate like so:
What tool can I use to merge all the polygons ...
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21
votes
2
answers
11k
views
Fixing orphaned holes in R
I'm trying to perform a union on a common field after merging two adjacent shapefiles. The shapefiles end up with at least one thin sliver of space between them. When I attempt a union I get the ...
- 1,177
18
votes
2
answers
15k
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ogr2ogr merge multiple shapefiles: What is the purpose of -nln tag?
The basic script in order to iterate recursively over sub-folders and merge all shapefiles into single one is:
#!/bin/bash
consolidated_file="./consolidated.shp"
for i in $(find . -name '*.shp'); do
...
- 1,799
8
votes
3
answers
2k
views
QGIS - Merge raster layers and take maximum value of both
I am trying to merge two partially overlapping rasters into a single raster. Where they overlap, I would like to take the maximum value from the 2 rasters.
The rasters represent radio coverage from ...
- 113
6
votes
1
answer
8k
views
Merging shapefiles with attributes using PyQGIS?
I have some shapefiles. They are all the same kind of shape and all have the same attributes.
If I wanted to merge them manually the "Vector/Data management tools/merge shapefiles to one" works fine.
...
- 1,441
6
votes
1
answer
1k
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Merging Features
I want to merge features of a vector layer into one single feature using the python console.
Somewhere I found the following solution. However it does not seem to work for me. When I execute the ...
- 213
5
votes
1
answer
3k
views
Dissolve (merge) polygons QGIS based on attribute values only when are adjacent
I am a fairly new user of QGIS having a question regarding dissolve functionality.
I am working with the NUTS-2 shapefiles provided by EU, which I have imported in QGIS. I have created a new layer ...
- 71
5
votes
1
answer
5k
views
Merging lines (with and with no overlaps) in QGIS
I have two layers ("Layer_1" and "Layer_2") of lines where they sometimes overlap and follow each other for a bit and then takes another route (see the image below).
"Layer_1": Red line
"Layer_2": ...
- 1,941
5
votes
5
answers
599
views
Merging polygons only if three or more are on top of each other in QGIS
I am working on a layer with many polygons (circles). I would like to create a polygon containing only the areas where 3 or more circles overlap (in my example there would be only 1 area in the east). ...
- 51
5
votes
3
answers
2k
views
Merge Vector Layers fails in QGIS
I'm trying to merge two vector layer as part of a graphic model but get an error:
OBJECTID field in layer layer1 has different data type than in other
layers (Integer64 instead of Real) Execution ...
- 68.9k
5
votes
1
answer
11k
views
Merging multiple LiDAR (.las) files using ArcMap
I downloaded about 9 LiDAR scenes from USGS and I want to use ArcMap to merge them so that I can carry out tasks on them together as opposed to one by one.
- 93
4
votes
1
answer
1k
views
Merge adjacent polygons & concatenate attribute values (QGIS)
In QGIS 3.16. I have a layer of 1000+ polygons, many of which are adjacent (touching, overlapping, or one completely inside another). If all of the adjacent polygons are merged, I will end up with ...
- 1,061
4
votes
3
answers
22k
views
Merging attribute and geometric features in QGIS?
I have polygons shapefile in which some of the polygons have same attributes as seen below:-
In QGIS, how do I merge the polygons having the same attributes into one polygon?
In other words, am ...
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4
votes
1
answer
4k
views
How to merge many shapefiles in different folders?
Directory structure is basically as such: county\City\prep\POI\Completed\C1, ...C2, ...etc\
I'm trying to write a script to go through the *\Completed*\POIS.shp and merge them all together, at a ...
- 63
4
votes
1
answer
2k
views
Merge selected feature pyqgis
I want to merge the selected features. I found this post but I can not do it.
Can anybody help me?
layer = iface.activeLayer()
obj1 = 24
obj2= 25
expr = QgsExpression( " \"ID_PARCEL\" = '{}' OR \"...
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3
votes
1
answer
8k
views
How to merge output shapefiles in model builder
I have a layer with several polygons and a road map. I need to take each polygon and use it to clip the road map, dissolve all of the road records into one, and then merge the polygons into one ...
- 97
3
votes
1
answer
890
views
Getting maximum values of attribute of multiple Shapefiles merged into new shapefile in QGIS?
I have thousands of points in multiple shapefiles. I want to get the maximum value of an attribute of each shapefile. Then I want to merge all the maximum values to a new layer.
Is there a way to ...
- 73
3
votes
1
answer
6k
views
Using multiple tiff files as a data store in Geoserver
I have hundreds of tifs I want to use as a data store on my Geoserver. So many that QGIS won't merge them for me. I heard some about .vrt but I never found a clear source of information on the ...
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3
votes
0
answers
200
views
Merging attributes of selected features tool not working in QGIS 3 [closed]
I want to combine some columns between 2 data attribute tables.
The question, which I asked a while ago:
Copying features from one attribute table to another using QGIS
leads to quote long way.
...
- 4,005
2
votes
1
answer
4k
views
Which value does raster merge chose in overlapping area?
When using the 'Merge' tool in QGIS, which raster value does it choose when there are overlaps between the raster?
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2
votes
2
answers
609
views
Combining data from overlapping polygons and assign [duplicate]
I have two multipolygons layers:
Layer A: Census blocks with data from 2010 (last census).
Layer B: A study about poor neighborhoods with data from 2016 (POOR NH).
Both layers have a "population" ...
- 103
2
votes
1
answer
1k
views
How to merge single polygons to multi part polygons by maximum distances?
I have a polygon layer with a land-use class and ID for every polygon. How can I merge polygons (into multi part polygon) which do not adjoin, but are not further than x meters apart from each other.
...
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1
vote
2
answers
1k
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Merging LiDAR tiles without losing data in QGIS?
I'm trying to merge some LiDAR tiles together but when I do, the clarity of the image drops, so I think that means I am losing some data.
How do I merge the tiles and keep all of the data and the ...
- 39
1
vote
1
answer
146
views
Overlaying binary raster over a colourized raster layer so they are one raster, without colour being affected
I'm looking to merge a raster layer of bounding boxes over top a standard RGB raster layer so that the boxes fit over certain features in the background raster, but they are now the same layer. The ...
- 689
0
votes
1
answer
695
views
Connect points from two SpatialPointsDataFrames in R, considering the closest distance
I have two SpatialPointsDataFrames. In SpatialPointsDataFrame one (dat1) I have three points (A, B and C). In SpatialPointsDataFrame two (dat2), I have eight points with temperature measurements. I ...
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0
votes
1
answer
462
views
Merging adjacent polygons to one which sum of attribute values of adjacent ones is between 1000 and 2000?
I have a huge number of polygons that contain attribute field that represent number of offices inside each polygon. Now I want to merge all adjacent polygons which count (sum) of offices values is ...
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0
votes
1
answer
4k
views
Merge two points of two different polygons to get one polygon at the end
I would like to join points from two different features. I already searched for plugins, but so far but didn't find one working plugin or solution for my task.
So here is a picture of 2 polygons/...
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12
votes
3
answers
39k
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Merging adjacent polygons using ArcGIS Desktop?
I want to use ArcGIS Desktop to merge adjacent polygons with each other.
There is no common field between the polygons and hence the Dissolve tool is not the ideal solution. The polygons that I want ...
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1
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arcpy.env.overwriteOutput = True not working for Merge of ArcMap
AOI_test = "AOI_test.shp"
arcpy.env.overwriteOutput = True
for i in loc_list:
AOI = "AOI_" + i + ".shp"
arcpy.Select_analysis("locality", AOI, " \&...
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10
votes
1
answer
2k
views
PostGIS: how to merge contiguous features sharing same attributes values?
I have a big PostGIS table storing line features.
I would like to merge features that are both connected to each other and have given attribute values identical. Here is below an example of what I'd ...
- 2,690
10
votes
2
answers
2k
views
Merging multiple temporal inputs in QGIS Graphical Modeler
I want to do a simple merge of some algorithm outputs in QGIS graphical modeler (not for an iterative process, like my previous question "Collect results of iterative processes in QGIS graphical ...
- 2,334
10
votes
3
answers
16k
views
Merge geojson polygons with WGS84 coordinate
I have a Geojson file with some adjacent polygons and I want to merge them into one. I know it's a recurrent question but I can't find information for polygons with latitude and longitude coordinates ...
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9
votes
2
answers
3k
views
Loading multiple shapefiles from +1000 subfolders
I have a WATERBODY shapefile for each region within each province in Canada. The region subfolders also contain many other features that I do not need. I am trying to upload and merge all the ...
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