Questions tagged [merge]

To combine two or more parts into a larger whole.

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80 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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1answer
43 views

ArcMap 10.6: Is it possible to extract point values from points?

I've got three point shapes with different fields that I cannot seem to merge as I get ERROR 000229: cannot open 'name of shapefile'. Instead of solving this error, I wanted to try something different:...
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1answer
45 views

How to keep color changes / corrections of all GeoTIFF files during merge with gdal or in QGIS?

I am trying to merge two GeoTIFF files in QGIS or w/ gdal, but when I merge them I lose the color changes / corrections I made to the second GeoTIFF. Is there any way to keep the color changes I made ...
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1answer
69 views

How do I merge a clipped raster on top of another raster is QGIS?

I am trying to merge two rasters (geotiffs) in QGIS. One raster is the original & the other is clipped to a specific region of the original raster and 0 applied to null area to make transparent. ...
3
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1answer
73 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 ...
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1answer
76 views

Dissolve (merge) polygons QGIS based on (non exact) attribute values

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. To ease the discussion, I ...
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1answer
37 views

Merge polygons based on nearest area

I have multiple polygons that show me metropolitan areas and rural areas across a state. I want to modify the layer so that there are no rural polygons by assigning portions of the rural polygons to ...
2
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1answer
52 views

Merging two neighboring cells in grid of type SpatialPolygonsDataFrame?

I have a grid of type SpatialPolygonsDataFrame (each cell has a set of data attributes). I want to merge each cell which has a surface < X with one of its neighbours. An example is depicted in the ...
2
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1answer
132 views

Dissolve Field Not Showing in QGIS?

Using QGIS 3.6 Currently trying to dissolve a polygon layer by FIELD values. QGIS 3.6 and the fields won't show up. In fact I am unable to dissolve by FIELD for any layer in my entire project. If I ...
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1answer
128 views

PyQGIS code for Merge Vector Layers

I've been trying to automate the merge vector layers via PyQGIS but I can't seem to get it right. This is my code: import os import processing loc = r"C:\Users\loc" os.chdir(loc) shapelist = os....
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1answer
68 views

Maintaining Borders when Merging shapefiles?

I am trying to merge two layers of a map which includes the state and county levels. I was able to edit the borders to look how I want, but when I merge them I am struggling to keep the style ...
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31 views

Merging polygons in ArcMap?

Inside the red circle, there are two yellow polygons of different sizes inside the large polygons. There are many such polygons. I want to merge the attribute information of a large yellow polygon in ...
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1answer
52 views

QGIS - Missing GDAL Tools plug-in (merging Raster TIFFs of satellite image)

I am trying to install the GDAL Tools plug-in but it is missing from the Plug-ins list. I am looking to merge multiple Raster TIFFs which make up my satellite image basemap, exported using Atlas, ...
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0answers
31 views

Tabulating points from CSV that are within 1 km of points from another CSV using QGIS?

I have two sets of data. One that is from a csv and contains a relatively small amount of data (we will call location data), and another csv that contains a larger dataset that contains environmental ...
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2answers
133 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" ...
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1answer
619 views

Combining multiple shapefiles into one shapefile using ArcMap?

I have two .shp containing stream segments from two different NHD HUC files (see photo). I would like to make these into one shapefile and combine the attribute tables. I have tried to use the merge ...
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1answer
94 views

Merge small underlying polygons into overlaying shapefile with larger polygons [closed]

I have a dataset with the average rent prices saved in a vector layer (.shp). It is "street" based, so it has quite a fine resolution. I have a different dataset (containing info about crime rates) in ...
3
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2answers
53 views

Are there different definitions of “merge”?

The merge tool in ArcGIS ArcToolbox is used to combine two layers, but it seems that there is also a Merge option under Modify Features that is used to combine and dissolve adjacent features within a ...
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0answers
54 views

How to merge / join line segments by attribute and split at intersection

I have a complex network of line features with a lot of attributes (and unique IDs). Many features have the exact same values (exept the ID). I need to join all features with the same attribute which ...
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0answers
106 views

Merge shapefile data within the same spatialpolygonsdataframe in R, when not all data have the merge column populated?

I have a 156Mb shapefile of New Zealand polygons down to the individual suburb level. There are 7,369 polygons. Each polygon has a unique ID (1...7369) in an ID column. There is a Suburb column ...
3
votes
1answer
59 views

How do I split subjacent lines and merge attributes in QGIS [duplicate]

I have 2 vector line layers. They are subjacent, so one of them is exactly on top of the other but the features have different nodes and attributes. My goal is to create labels and descriptions for ...
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0answers
45 views

Merging sections of lines with same geometry in QGIS? [duplicate]

I have a series of bus routes with the frequency/hour attached in QGIS. The idea is to combine the frequencies on routes with more than one bus to have an overall bus frequency for the sections of ...
3
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1answer
52 views

Copy elevation from points to line

I have a vector line, but it has no z-dimension. I have some points along the line, which have the elevation included. Can I add the elevation from the points to the line at that specific point? ...
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1answer
129 views

Merge connected lines and split them after set unequal distances

I need to edit line features in QGIS 3.4.4. I have more than 1000 line features that I want to first merge and then split. The line features describe roads in useless intervals, my goal is to ...
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0answers
39 views

Fixing discontinuity after blending two rasters using GDAL

I've tried finding similar questions with no luck, so I apologize if this has been asked already. I have an observed temperature raster and a model analysis temperature raster. In places where there ...
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0answers
114 views

OSM.PBF does not contain all exported/merged/converted data from XML using OSMIUM/OSMOSIS

I have three pbf files, each containing poi nodes x ways y multi-polygon relations z separately. I tried merging them using: osmosis --read-pbf file=x.pbf --read-pbf file=y.pbf --read-pbf z.pbf --...
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0answers
85 views

QGIS 3.4 merge raster output only 1 px wide

I have four .xyz files with terrain data. I can convert them to TIFs in QGIS 3.4, but in either format, merging them fails. The merge output always has the X dimension of the merged rasters, but a Y ...
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2answers
149 views

Merging layers with different objectid types

I have a problem that's stumped me. I'm merging flood hazard layers from FEMA. For most states, the objectid is a real number. California (we're always the weird ones) has an objectid that's '...
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2answers
73 views

Merging feature classes in memory gives ERROR 001156?

arcpy.AddField_management("in_memory/originalfc","ALPHABET","TEXT",1) arcpy.Select_analysis("in_memory/originalfc","in_memory/A","attr<=0") arcpy.CalculateField_management("in_memory/A","ALPHABET",'...
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0answers
204 views

Python: No module named 'gdal_merge'

I try to merge two DEM data sets with python, using gdal_merge, but it doesn't work. I install like this: from osgeo import gdal But this doesn't work: import gdal_merge as gm I get the error ...
1
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1answer
189 views

Merging TIFF files using QGIS?

I have around 1200 tiff files (example below), and corresponding .tfw files and .aux files with sonar data that I'd need to merge into one file and I'm struggling to do so. I browsed some topics ...
1
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1answer
69 views

Why can't I buffer polygons in ArcGIS Pro?

I've created a polygon by merging several polygons from the same layer using the merge option under Edit menu. Now I cannot buffer the resulting polygon. I tried repair geometry it didn't help. I'm ...
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0answers
82 views

Merge gives an empty output

Within ModelBuilder I've got an orginal file, out of this file a few locations are extracted by mask and the data has been changed afterward. Now I am trying to put this data back by first erasing the ...
6
votes
1answer
222 views

Is there a “Merge Parts” tool in QGIS?

In the advanced digitizing toolbar, QGIS has these 3 tools: Split Features, Split Parts, and Merge Features. Is there a tool or equivalent algorithm for the logical fourth one: "Merge Parts"? This ...
3
votes
1answer
503 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": ...
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0answers
201 views

Merge two shapefiles into one new shapefile with OGR/GDAL library in C#?

I am currently coding a C#/WPF application that lets you choose two shapefiles and create a new merged one, with the content of both shapefiles. My problem is that I am quite new (1 month with gis) ...
2
votes
3answers
133 views

Merging layers into one- QGIS

I have numerous population layers for the Baltic Sea. In the attribute table of each layer, I have population densities, name of towns etc, all the same geometry (points). I'd like to merge the layers ...
8
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1answer
481 views

Merging overlapping buildings but not adjacent buildings using ArcMap?

I have a dataset that has buildings generated from satellites which leads to imperfect building outlines. The buildings circled in red are one building but the computer drew them as having multiple ...
0
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1answer
30 views

Merging layers with preferences or ranks using ArcGIS Desktop?

I want to make a "Mosaic" or a "Compilation" of 20 shp. layers which some of them are overlap. The layers has a field named "Year" and I want the newest be on top and delete the overlap older shps ...
2
votes
1answer
136 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 ...
4
votes
2answers
637 views

Getting black square after merging two rasters in QGIS

After merging two SRTM TIFF files all I get is a black rectangle. Merged raster has zeros next to both black and white squares under layer name. I have no clue what I am doing wrong. Any suggestions?...
0
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2answers
96 views

GRASS r.viewshed from Python with multiple raster tiles

I'm new to GRASS and struggling to do a viewshed across multiple tiles. I have got the GRASS r.viewshed function working from Python as follows for a single tile: gis_path = os.path.join(output_dir, '...
2
votes
1answer
57 views

Merging multiple rasters applying priority rules using ArcGIS Desktop?

I have three raster layers covering the same geographic area. I would like to merge them into a single raster layer. The layers have different levels of importance, so I would like the merge to move ...
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0answers
24 views

Project tool swallows data [closed]

I want to project my data into another coordinate system. I tried using the Project tool but when I opened the attribute table after ArcGIS said it had finished it was empty. I also tried using ...
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2answers
2k views

Merge thousands of rasters with gdal_merge.py

I have several thousands of small rasters, kb size, tens or hundreds of pixels most of them. Batch command of gdal_merge.py can't take all the files at once, so I am doing partial merges of chunks of ...
0
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1answer
473 views

Using GDAL or Python, how can I merge/combine 3 NITF images (RGB) into one image and keep the RPC metadata intact?

I'm looking to merge 3 imagery bands that are saved as separate files. The file format is NITF. The reason they are saved as NITF is because they have RPC metadata embedded into the images. I would ...
1
vote
1answer
46 views

Appending annotations changes the scale of the new annotation?

I am trying to append an annotation feature 1 (green)to another annotation feature 2(red). While these features are separate, I have the scale set to 1:4000, and the font size is correct. However, ...
1
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1answer
56 views

Merging on specific fields

Lets say I have three shapefiles/features I want to merge: 'florida.shp', 'mississipi.shp' and 'louisiana.shp'. They all have 3 standard fields common to all: 'DFIRMID', 'SFX', and 'FIRMPAN'. I want ...
0
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1answer
110 views

batch merge error: Error in match.arg(method) : 'arg' must be of length 1

I am attempting to read in a series of polygon shapefiles from a directory and batch merge them into a single shapefile. They all have the exact same field names. I am using this code: all_data <-...
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0answers
82 views

Python - Merge shapefile polygons based on criteria

I have a shapefile with thousands of polygons and would like to merge (join) adjacent polygons based on a threshold between attributes. I need to use python because I'm not allowed to use ArcGIS. e.g....