Questions tagged [merge]

To combine two or more parts into a larger whole.

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Spatially merging two netCDF raster layers into one layer while using ArcMap

I tried to merge two .nc-files into one within ArcMap. There is one file containing the specific values for North America and one containing the values for South America (see the image below). My ...
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QGIS Merge two DEMs of different resolution

In QGIS I am trying to merge 2 DEMs of different resolutions where there is a slight overlap between the two i.e. merging a bathymetry DEM with a topo DEM across a shoreline. As it is of a higher ...
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Creating one line for multiple data

Using QGIS, I want one line representing three data in the attribute table. I merged and used the multipart to single part. Only one data in the attribute table appears. Is it possible to get multiple ...
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How to create a mosaic from different shapefile in R?

I have 37 shapefiles with different names.Individually each of them represent a different part of a country. I would like to create a mosaic of my 37 shp to just have one a the end. To make things ...
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QGIS only using one core

I am using QGIS 3.24.2 Tisler. Machine is an i9-7900 @3.30 Ghz 64 GB RAM using Windows 11 64bit. Disk is SSD and Gfx card is a RTX2060he When doing a raster merge (Raster - misc - merge) of multiple ...
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Merging multiple point layers with common fields to create single table in QGIS

I have seven point shapefiles at the same geographic location with three common fields ("ID", "name2", "name3") and a fourth field, ("uni_value") that is unique ...
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Edit polygon - QGIS - remove a line or space in middle of merged polygon

I am editing a map using QGIS. Here my steps 1. Select multiple polygons 2. Merge them into one new polygon Question: How can I remove those line (in blue circle) and one polygon fully cover the ...
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Merging point and polygon in ArcMap ModelBuilder

I have a model in ModelBuilder to perform a merge which is used to iterate through from subfolder 1 to subfolder 32 that looks for the polygon-type shapefile and joins them. However, the model does ...
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Attempting to "Merge" Tiles

I just searched the GIS Stack Exchange using "how to merge DEM tiles" and found out about 'GDAL' -> 'Raster miscellaneous' -> 'Merge'. I tried to utilize this tool to merge 9 rasters ...
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How do I preserve all fieldnames when merging features?

I have a featureclass of polygons with 10 fields. field_names = [f.name for f in arcpy.ListFields(inputlayer] print (field_names) ['OBJECTID', 'WorkSiteID', 'Programme', 'NameOfWorks', 'Description', ...
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Merging drone/photogrammetry-derived DEM and satellite-derived DEM using ArcGIS Pro

I have a DEM that was produced from drone images at a site of interest, processed through Agisoft Metashape. Because I used a drone, the site-level DEM boundaries/edges are irregular rather than ...
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Merging multiple image collections into one in Earth Engine without losing image properties

I have 4 different image collections and I am trying to merge them into a single collection. Further I want to mosaic them based on the date of acquisition. I tried this code, var Res_collection = ...
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Qgis- Merging datasets of similar data without losing attributes

I'm looking for advice on how to compile some datasets that each have a different set of attributes. Each dataset is point data, recorded in one of the two coordinate systems that have been used ...
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2 answers
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QGIS - Adding data from a raster into existing different sized polygons

I have a raster layer with 100x100 pixel size that contains expected soil subsidence (calculated) and a polygon layer with smaller polygons that contains the measured data. I want to add the ...
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Combining polygons based on distance matrix in QGIS

I have the following layers in QGIS: a polygon layer made up of all the zip-code areas in Germany a layer displaying all the electricity grid nodes in the country. In a previous step, I created a ...
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Merging lines of one feature class from pair coordinates with ArcPy

cursor=arcpy.da.searchCursor("mettaled", "SHAPE@") for row in cursor: geom=row[0] for part in geom: for pnt in part: x,y=pnt.X, pnt.Y print x,y I ...
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Merge Duplicate Rows with different Values in one Row using ArcGIS Pro

I joined a table with the area of a value to a shapefile with building footprints. Now I have up to 3 rows with the same ObjectId/Single Building Footprint (from the Join) but each of the 3 rows has ...
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Rasterio.merge.merge() does not work

I have 2 .tif files that I would like to merge with rasterio. They have the same crs, are in the same area, and overlap a bit. I tried to use the merge() function of rasterio.merge but I end up with ...
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Merging two contour layers in QGIS changes the column heading names and creates more columns

I have two contour layers that I'd like as 1. Using Vector-Data Management Tools-Merge Vector layers, I check the box next to the two contour layers, add the UTM projection I'm using, save file to ...
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1 answer
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Sum two partially overlaping rasters in QGIS: auto-detect extent and resolution

I need to sum two rasters (r1 and r2) using QGIS. They're made of 0s and 1s (black/white), and overlap only slightly over a common border. In the overlapping area, r1 has data in part of it, and r2 ...
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Combining non-contiguous polygons in ArcGIS Pro

I am trying to combine non-contiguous polygons that are close but not touching one shape. As if you were to draw a line around these five parts connecting them into one. Originally these were part of ...
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2 votes
1 answer
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How to merge the attributes of point shapefile in QGIS

I am trying to make wind map in QGIS, where I used vector point shapefile. Because I have two different shapefiles I first merged them: Then I Dissolve it where I choose two attributes to dissolved: ...
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Losing all information when merging two LiDAR tiles

I am trying to create a raster mosaic by merging multiple LiDAR MHC (canope heignt) tiffs. They have the same CRS but have different elevation ranges. For instance, one can be 0-35.46m and the other 0-...
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Merging lines (create one line from multiple lines) using ArcGIS Pro

I have polyline shapefiles with hundreds of line segments - streets, paths, highways. The rules are that a line can be divided only on intersections or when the attributes change. But all of the lines ...
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Join adjacent polygons based on aspect values only when "look each other" [closed]

I have a map with polygons that represent the average of aspect for a certain slope of a mountain region. I'm looking for a way to merge only adjacent polygons that "look to each other", ...
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2 votes
1 answer
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How can I merge a dataframe and simplefeature in R?

I'm working on converting an old script from using sp() to sf() and some of the computations have to be rewritten, including some operations which (used to) use cbind with over() like so: cbind(...
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7 votes
3 answers
229 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 ...
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ArcMap geoprocessing (merge and buffer) suddenly working very slowly

Typically, it works almost immediately but lately, anything I try to do (mainly merge or buffer) has begun to take an extremely long time to process. I've tried clearing the cache and limiting the ...
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2 votes
1 answer
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Value error when merging .nc files: xarray could not find any dimension coordinates to use to order the datasets for concatenation

I want to merge multiple .nc files into one. Each of the .nc files corresponds to a timestep which should be added together to have one .nc file with all data for all dates. When I execute the ...
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1 vote
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Using GDAL translate with VRT - merge error in overlap creates black 📦

I have a series of hi resolution multispectral images from Maxar's WV2 in .NTF form. I am trying to stitch tiles together to create a single image, and I've been having a lot of trouble. I initially ...
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Raster Merge from each folder using Mosaic To new raster

I have rasters in each folder and I want to merge rasters of each folder and save them individually. In above model I am able to merge all rasters from both folders. Any way I can fix this in a model ...
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Merging multiple road network shapefiles

I have created multiple connected road network shapefiles of the same extent based on a subset of point locations with the v.net connect operation. I split the point locations into 4 equal point sets ...
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ArcPy merge output only has the first feature class in list

I have a script that generates several feature classes. I use a function to create the feature classes within a loop. The loop outputs a dictionary with a name string as key and the feature class path ...
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1 vote
1 answer
52 views

Merging multiple intersecting/overlapping polygons in QGIS [duplicate]

Is there a way in QGIS to select multiple polygons and merge only the ones that intersect/overlap with each other? As in the example bellow only those appointed would merge, becoming each a single ...
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1 vote
1 answer
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Overlaying values of one raster over another

I have two rasters. One is larger and binary called mask (all values are either 0 or 1). The smaller raster fits inside this raster but has a much smaller extent smallerMask. All its values are 1. ...
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3 answers
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How to merge features while keeping the originals

I have a polygon layer of basins and want to merge some of the basins, but still keep the sub-basins that form the larger basin. Is that possible without first duplicating the sub-basins?
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1 answer
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Merging polylines with the same class and attributes in QGIS

I have a dataset of thousands of polylines with multiple classes and attributes in which it is possible that polylines have the same class, but different attributes. There are some polylines that are ...
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1 vote
1 answer
51 views

Merging raster data with certain condition

I am doing a project and one demand is to create single raster by merging two rasters (Raster U and Raster R) into one (raster N) and only if conditions are met. The picture below shows those ...
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Merging two DEMs of different resolutions

I have two sets of GeoTIFFs (or ArcGrids) one at 2m resolution and another at 1m. I would like to merge the 1m on top of the 2m, coverage varies over the datasets as seen here for example: 2m coverage:...
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1 vote
1 answer
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How to add a band to xarray dataset using rioxarray

I have two datasets, both rasters, which I would like to combine into 1 raster. This should not be difficult, but I'm having a hard time.. Both have the same extent/resolution etc. One raster has 231 ...
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Combining all features into one in same shapefile in QGIS

I am creating fiber routes on a CAD drawing and need to merge the features in the same shapefile. Application websites will not allow me to upload because it has several line features. I need every ...
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1 vote
1 answer
180 views

Can't merge two layers because of field length in QGIS 3.16

I'm trying a model which did work with QGIS 3.12 but don't in QGIS 3.16. In this model, two vector layers are merged by the algorithm native:mergevectorlayers. In the new version if a field of ...
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2 votes
0 answers
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Updating "no data" value of merged raster layer to be the same as the "unmerged" layer in QGIS?

I have many raster layers that I want to merge and a lot of these layers have gaps of no data. These gaps are specified as "no data" as pictured in image 1 I then go to the merge raster ...
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3 votes
1 answer
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Merging DEM elevation attributes with streets shapefile

I have a DEM and a separate shapefile of all the roads within the bounds of the DEM. I want to combine the elevation data with the road data so that I can have the roads displayed with a graduated ...
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Merging overlapping multiband rasters in QGIS - massive files?

What is the best way to do this? I have two images that overlap about 20%, and they are 4 bands each. Same satellite provider, resolution, etc. so there's no apparent issue with alignment. Each file ...
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1 vote
1 answer
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How to delete duplicate objectID in ogrmerge?

I am using ogrmerge to merge two GeoJSON files together. These two files can sometimes have duplicate objectIDs. Is there a way I can specify from the ogrmerge command options to only select distinct ...
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1 vote
1 answer
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Merge Vector Layers fails on point layers with no log output [closed]

I'm trying to merge three layers in QGIS 3.10.14. Each layer contains only points and displays correctly in my map view. When I use the Merge vector layers menu option, I get the correct dialogue box. ...
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1 vote
0 answers
57 views

Unable to aggregate line segments while summing values

I've a layer with multilines, overlapping to a various degrees. I need to merge/dissolve them "downwards" while summing their values for the overlapping segments. I made it to "Union&...
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2 votes
0 answers
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Merging multiple layers together

I have got a series of mastermap layers, each displaying data relating to a 5km square of land. The layers contain data on things like roads, water, buildings etc. In total there are around 30 ...
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Merging effects in a .stl file in QGIS

After merging two DEMs in one, I obtained a .stl file using (DEMto3D complement). In this .stl file I see something like a net where A+B DEMs were merged. The blue zone, only affected by one DEM, its ...
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