Questions tagged [merge]

To combine two or more parts into a larger whole.

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Merge Raster Data Not Working

I am trying to merge about 70+ raster images into 1 large raster tiff. I try running the tool located in raster>miscellaneous>merge and before running the tool, selecting all the images I'd like ...
CaptainFishboy's user avatar
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Merge road layer.shp and underground bt layer.geojson

I would like to merge a road layer .shp and a BT souterrain.gejoson network layer to create a single layer. This will allow me to form a unified network to calculate the shortest path between two ...
rzk's user avatar
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Removing the split between merged polygon in QGIS

I merged two polygons within one shapefile and then aligned all the vertices so that they were adjacent, but how do I remove the former edges that bisect the polygon so that the geometry is continuous?...
MapDeath's user avatar
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QGIS DEM (Raster) merge: errors

I'm trying to merge 4 tiles (ASC) of a French 1m digital elevation model. Files are loaded in QGIS, they bear no errors, value range is coherent. Merging comes with errors and the result is a raster ...
Gilles's user avatar
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3 votes
1 answer
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How to speed up ST_Union PostGIS query for complex problem

I'm fairly new to working with PostGIS and have experienced the issue of extremely long runtimes when working on my data. Here's what I'm trying to do: I have an infrastructure dataset that is made up ...
Felix_geospatial's user avatar
3 votes
1 answer
171 views

How do I merge/dissolve two polygons within one shapefile in QGIS?

I have a shapefile composed of many polygons. I want to merge/combine/dissolve some adjacent polygons that I have selected within the shapefile into one polygon without any slivers or lines left in ...
MapDeath's user avatar
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2 answers
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How to union two polygon shapefiles by one or more attribute fields in QGIS

I would like to union two polygons that have the exact same fields in their attribute tables in QGIS. However when I use the Union tool, it makes an attribute table that has exactly twice the amount ...
MapDeath's user avatar
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4 answers
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Merging features with same value in a table (CSV)

I have a table (CSV) with statistical data for different neighbourhoods in a city (population according to different age categories). My problem is that the neighbourhood doesn't have one field per ...
Klara H's user avatar
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Using Merge in ModelBuilder of ArcGIS Pro

I am relatively new to ModelBuilder. I am trying a basic task using the merge function. I have a folder which consists of a lot of shapefiles. Each shapefile from the folder needs to merge with file '...
Sara's user avatar
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How do I merge 8 data frame without having duplicate suffixes?

I'm trying to merge a grid cell data set with 7 travel time (to shopping centres) data sets. Here's the head of the grid cell data: Here's the head of one of the shopping centre data sets(The other ...
mfirdaus_96's user avatar
4 votes
1 answer
178 views

Display only one label for overlapping points in QGIS

I have a point layer with some overlapping points but I want to display only one label per symbol. For line and polygon symbology there is the "Merged features" option to agglomerate ...
dmjf08's user avatar
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Correctly merge Landsat images in a median mosaic using different tiles

I have several Landsat 8 and 9 images, from two different tiles that I want to merge together in a median mosaic. The tiles are tiles that overlap, with two images for each tile. What I'm doing to ...
rrwork___'s user avatar
1 vote
2 answers
89 views

Merging layers, then dissolving and keeping all attribute values in QGIS

I have three layers in QGIS, each with one feature, including some attributes. Layer 1 has attributes a, b, and c, Layer 2 has attributes d, e, and f and Layer 3 has attributes g, h, and i I want to ...
winnewoerp's user avatar
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Is there any way to merge multiple .cog files into one using python?

I need to merge several .cog files into one. I have tried using rasterio, rioxarray, gdal, etc but I have not been able to get it to work. The closest I have been able to get was through this function ...
Guzmán R's user avatar
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70 views

Merging multiple line and point vectors in QGIS 3.28 [closed]

I have hundreds of line and vector layers. The line and vector layers are from several kml files. I want to combine the line and point vectors respectively and automatically without having to manually ...
SimplyWilly's user avatar
2 votes
1 answer
58 views

Should I merge SRTM tiles then reproject or reproject each tile then merge?

I have downloaded SRTM elevation tiles for England and Wales from USGS EarthExplorer. There are around 40 raster files to cover England and Wales. I now need to use QGIS to create slope and aspect ...
BlackDouglas's user avatar
2 votes
0 answers
32 views

Merging smaller polygons into bigger surrounding polygons in QGIS [closed]

I am using QGIS 3.34.2 (Prizren). I am using a village-level shapefile which I downloaded from SHRUG. I have to use only the villages in West Bengal for an analysis. Furthermore, I need to combine the ...
Ramandeep's user avatar
1 vote
1 answer
29 views

Merge multiple histograms into a single table and export as CSV

I'm trying to merge multiple histograms of NDVI into a single table for future analysis I know how to export and download single histogram like in the second image, but I'm aiming for something that ...
Harel's user avatar
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3 votes
1 answer
85 views

Merging all layers found within File Geodatabase using QGIS

At 3.34.1, I need to merge all layers within a single File Geodatabase. All layers are polygonal and are in the same CRS. Specifically, I would like to conduct the merge without having to first load ...
Stu Smith's user avatar
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1 vote
1 answer
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Connect touching lines by condition using expressions in QGIS

I have a polyline layer (Layer_A) in QGIS that represents entities (street crossings) that either consist of a single feature or are split into two or more features. The entities may also touch at ...
winnewoerp's user avatar
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ArcGIS Pro 3.1.2 change only blank selected cells in attribute table

I am using ArcGIS Pro 3.1.2. Is it possible to change only the null values cell in a selected dataset? I could have export the selected features as a new shapefile. Select the null values and replace ...
GIS Noh's user avatar
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1 vote
1 answer
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How to merge sample points that are within a certain distance of each other and calculate mean attributes values for merged points in QGIS?

I have a data set like the following in .csv: sample latitude longitude variable1 variable2 variable3 A 37.18 -115.85 1 0 0 B 37.18 -115.85 1 0 0 C 37.18 -115.85 1 0 0 D 39.44 -117.66 0 1 0 E 39....
goshawk's user avatar
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Using data points lying within certain isochrone to model walking routes in QGIS

I am trying to model the routes students take to university on foot using QGIS. I have the student data in point form, but this is the student data for the whole city. I also have an isochrone which ...
jd6915's user avatar
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1 vote
1 answer
53 views

Rasterizing raster layers with style

I am merging some old maps with the georeferencer tool. but there are gaps on the edges of the old maps. These gaps can overlap the other map when merging the maps. As a solution I made the white ...
firstlord's user avatar
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43 views

Merge two GeoJSON files into one creating connection between parcel info and object info

I have two GeoJSON files, one with parcel info (multiplygons) and one with object on the parcel info (multipolygons). The files have exactly the same attributes. What would be the best way to join ...
zizu 112233's user avatar
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32 views

ArcGIS Pro 3.2 fill gaps line section using another line layer

I extracted two lines layers of road condition. One was surveyed when the roads were dry. The other layer is when the roads were wet. The dry layer has some gaps And I want to fill these gaps with the ...
GIS Noh's user avatar
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1 vote
1 answer
150 views

Treat overlapping pixel when doing merge GeoTIFF images using Rasterio

I have a list of GeoTIFF images. I would like to merge these images together. However, as my understanding, it will take in turn the file and at overlapping pixels will receive the values from the ...
Sang Truong's user avatar
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0 answers
38 views

Merging multiple records into 1 record, group by field ‘group’

I have a point geometry file (GeoPackage) which I am working with in QGIS. It contains tens of thousands of records which discuss the topic 'Mineral occurrences'. Within this point file exist ...
FlyHi's user avatar
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49 views

QGIS: Merging neighbouring polygon leads to multipart polygon

I have to merge a lot of neighbouring polygons and for some of them I always end up with a multipart polygon even though the two polygons share multiple vertices and edges without space in between. ...
michafranz's user avatar
2 votes
1 answer
107 views

Merging multiple records into 1 record, group by field 'group'

I have a point geometry file (GeoPackage) which I am working with in QGIS. It contains tens of thousands of records which discuss the topic 'Mineral occurrences'. Within this point file exist ...
FlyHi's user avatar
  • 29
0 votes
1 answer
51 views

Merging features on the same ID but other attributes combined [closed]

I have a layer with data: ID | Attribute1 | Attribute2 1 x b 2 x c 3 y d 4 y e 5 z f I want to dissolve ...
Lutu's user avatar
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0 answers
96 views

Merge overlapping rasters but preserve all original values (R)

I have a SpatRasterCollection, each raster of which has the same resolution and the same set of variables. Some of the variables are numeric and some are categorical. And some cells of some rasters ...
jccborders's user avatar
2 votes
1 answer
111 views

How can I merge two line layers correctly for network analysis in QGIS?

I have a graphical model in QGIS that takes a basic sidewalk network (derived from OpenStreetMap data where separate sidewalks geometry exists) and adds additional crossings automatically. As a last ...
winnewoerp's user avatar
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1 vote
1 answer
115 views

Merging a DataFrame with a GeoDataFrame based on two keys

I have a GeoDataFrame called gdf_points with a list of POINTs: index NAME geometry 1 A POINT(A) 2 B POINT(B) And another DataFrame called df_names in which each POINT is associated with possibly ...
Omer Tzuk's user avatar
1 vote
2 answers
146 views

GDAL remove nodatavalues from output for COG format

I need to remove the nodata values from the final mosaic of Sentinel-2 data. Here is the process I apply to each single file: gdalwarp -t_srs EPSG:4326 -srcnodata 0 input.jp2 output_warp.tif ...
Monica Rossetti's user avatar
1 vote
1 answer
76 views

Voronoi polygons along given border in QGIS

I have a shapefile that contains districts (polygons) of a country. I added centroids to each district in order to create Voronoi poylgons around them. On this new layer, the outlines of the Voronoi ...
Ann's user avatar
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0 answers
31 views

Result of merge in QGIS is image that doesn't contains all the merged raster

I'm trying to merge ~10 rasters that I have on qgis. Each raster has 2 bands.The rasters overlap each other, and their no-data value is -9999. This is how all the rasters look like before merging (the ...
ReutKeller's user avatar
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2 votes
2 answers
80 views

Merging polygons based on distance in QGIS

How can I merge not overlapping polygons? I'm trying to set up a model that merges polygons that are within 500m from each other, at the closest edge of the polygon. I have tried with the shortest ...
Endre Aaen's user avatar
0 votes
1 answer
39 views

Merge file of certain coordinates to shapefile of cities using ArcMap

I am using ArcMap 10.8. I have a shapefile of cities with their info like name, population and area so I have calculated each city's density of population. Now I have some certain coordinates and I ...
Fatima's user avatar
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0 votes
0 answers
116 views

Merge downloaded mbtiles

I would like to download the data of the whole world (or at least a continent) as mbtiles from the 2nd zoom level to the 12th zoom level using OSM or ESRI Topo Map and use it offline. But I can only ...
Ecem's user avatar
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0 votes
0 answers
81 views

ArcGIS Pro: merge small polygons with their larger enclosing polygons

Polygons with an area size below a certain threshold should be merged with their enclosing polygons within the same layer. The image shows several cases in one example: in case of a threshold of 700, ...
stonebe's user avatar
  • 445
2 votes
1 answer
119 views

How to merge raster classes using the raster calculator?

I need to do an analysis on landscape change for which agriculture is involved. In my raster they are defined as six different classes which is not relevant for my research I was wondering if you can ...
Hartje's user avatar
  • 133
3 votes
1 answer
111 views

How to merge lines with close coordinates into one line in PostGIS?

The database contains a collection of lines, which have pretty close coordinates (see red lines in the picture). Is it possible to merge these lines and create only one line, that is median of the 3 ...
Slava's user avatar
  • 65
0 votes
1 answer
63 views

Joining polygons touching and merging in one

I am working in QGIS, doing research in different types of forest reserves. I've got this layer of reserves which are for some reason divided into a lot of small polygons (image below). I want to ...
BlaZF's user avatar
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0 votes
0 answers
25 views

Mosaic to New Raster output discolored

I am attempting to mosaic 3 .tif files together using the Mosaic To New Raster tool in ArcGIS Pro. However every time I run the the tool the output comes out discolored (see attachment). I have ...
Robbie-G95's user avatar
0 votes
1 answer
122 views

Cannot join LAS file In QGIS with Whitebox Tools

I have 9 .las files that I am trying to join into a single .las file in QGis. I have been using Whitebox tools plugin in QGis and when I try to select all the files and assign an output file if get ...
proffarnsworth's user avatar
1 vote
0 answers
67 views

Download GLOBathy TIFFs by country rather than one at a time

GLOBthy seems to be a very useful resource for studying lakes worldwide, however it has one significant problem; every lake is saved as different TIFF,and apart from a few large lakes, none of them ...
Birdman's user avatar
  • 61
0 votes
1 answer
113 views

How to merge two *.gml files with different geometry types into one gml file

I have two gml files one contains linear data and the other one contains polygon data. I want to have the correct ogr command to merge the two gml files into one file. I found this answer from 2012 ...
milad's user avatar
  • 699
2 votes
1 answer
54 views

Merging polylines to next one in QGIS

I'm working with QGIS and I'm not super familiar with that. I created a Shapefile with several polylines. In some cases, my polylines do not match each other directly. For further proceedings, I would ...
Sulz's user avatar
  • 144
2 votes
1 answer
39 views

Merging overlapping parts based on priority in QGIS

Let's say I have two polygons for Protected Areas in my country, one for a National Park and one for a National Forest and they have an overlapping part. I want a tool that removes this overlap from ...
Juan Orozco's user avatar

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