Questions tagged [merge]

To combine two or more parts into a larger whole.

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0answers
36 views

How do I build a virtual raster to merge goetiff tiles?

I am new to GIS and I want to merge geotiff tiles to one raster tiff. Here is the source to the xyz files: https://www.opengeodata.nrw.de/produkte/geobasis/hm/dgm1_xyz/dgm1_05314000_Bonn_EPSG4647_XYZ....
6
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1answer
86 views

Merge/join only the lines which are snapped to vertices in QGIS

I have polygons drawn with AutoCAD as Mline (Multiline type) which are rendered in QGIS as 8 segments for each feature. An example of one selected feature is shown in the picture below: I want to ...
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0answers
38 views

Is it possible to merge multiple polylines into one

I have vehicle GPS coordinates of the route. In my case vehicles can drive through one road multiple times, so overall it can look like round trips. Is there any way to merge two traces into one, so ...
1
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1answer
37 views

Merging polygons in one layer by boundaries of polygons from another layer in QGIS

So I have two polygon layers, polygons in one layer are greater than in the other one. In some cases it is possible to merge smaller polygons so that they fit within the boundaries of a bigger polygon....
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1answer
635 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 ...
2
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1answer
63 views

How to mosaic 3 different layers that do not overlap and make them into 1 layer

I have 3 different independent layers which I want to merge into one layer: For creating those layers, I have calculted NDVI, calculted the mean and then I have created one layer that is lower than ...
3
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2answers
51 views

How to merge overlap polygon respectively in one shapefile in QGIS

I want to merge the polygons of one shapefile if they overlap, but I don't know what to do. I try'dissolve' but get only one final polygon. This is not what I need. I want to merge them respectively.
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1answer
49 views

Batch process for merging features in multiple layers

I have multiple (50) layers representing rivers and creeks which are polylines. However, they are broken into line segments so each river/creek layer might have 30 or so features within it. I know ...
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0answers
32 views

Creating a new layer for free space between existing layers

How can I create a new layer that will only show the 'free space' between the raster and vector layers that are currently on my map? Will I have to merge my existing raster and vector layers and use ...
0
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1answer
912 views

Collapsing parallel lines into a single line QGIS

I have a shapefile of the Washington metro area, but along much of the route multiple lines run parallel to each other (see picture 1) and I need to collapse them into a single line. I've tried ...
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2answers
9k views

Layer stacking Sentinel 2 imagery

Is it possible to layer stack all 13 Sentinel 2 bands or can I only layer stack those that are the same resolution (so for example the blue, green red and NIR bands). I have a very large area of ...
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2answers
1k views

Finding and merging lines that touch in PostGIS?

I would like to select and merge segments that touch like in the image below. My table contains single segments with their own id (shown in the figure), I just want to isolate single "group" of ...
4
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1answer
708 views

Calls to SAGA routines in QGIS not working cross platform

The ability to write and run cross platform scripts for QGIS using python is OUTSTANDING! However, when I try to run the SAGA:MERGESHAPESLAYERS algorithm from a python script it works fine in windows ...
2
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1answer
60 views

Automated Merging using ArcMap

I’m new to working on automating processes with GIS data and I’m trying to come up with a solution in ArcMap that will automate merging polygons that have “Shape Area < 25” into larger polygons. I ...
2
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4answers
4k views

How to merge/combine several tables in geodatabase into one table using ModelBuilder?

I have over 50 csv files that have the same data structure and I need to merge them into one table. As I need to build a model I have successfully imported all the files into a File Geodatabase. ...
2
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1answer
28 views

Import GPX track into existing Line/MultiLineString Layer

I'm working on a project to map utility lines on a small university campus. We have paper maps right now, and we're looking to step into the modern era a little bit. What I currently have set up is ...
2
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1answer
87 views

Merging rasters orthophoto overlapped with different resolutions using QGIS

I use 2 rasters orthophotos .TIFF : 1) the low resolution covering a large area. 2) the high resolution covering a small area and using an alpha band around the point of interest. My aim is to merge ...
1
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1answer
9 views

Eliminate line sections in a merge to use Qchainage plug in

in QGis I merged several layers, each containing sections of a road, to show a longer route on a map. Now when I want to use the qchainage plug in the plug in starts the count over again in each '...
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2answers
138 views

Creating script for clipping and buffering using ArcPy [closed]

You are a GIS analyst for the National Park Service. You have been asked to create a dataset showing "wilderness" areas in a national park. These areas are defined as 2,000 feet away from a paved road,...
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1answer
704 views

Creating model to batch select polygons by attribute and merge them together

Is there is a way to create a ArcGIS 10 MODEL to: batch select polygons from the same layer by attribute merge these polygons into one repeat this for all polygons shearing the same attributes ...
1
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1answer
568 views

How to set the “LAYERS” parameter of the QGIS 3 algorithm “native:mergevectorlayers”

I do not understand how to set the LAYERS parameter for the QGIS 3 native: mergevectorlayers algorithm (for standalone python code). Merge vector layers (native:mergevectorlayers) ... ----------------...
2
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1answer
70 views

Merging line layer symbology where streets intersect using QGIS

I am working on a thematic map in QGIS 3.4 where I created a shp layer for lines to draw streets on top of a background map. The problem is individually drawn streets that intersect. Is there a way ...
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0answers
37 views

Merging and snapping shapefiles

I have several large shapefiles from various sources. All cover various sections of oceans and many overlaps, as such the coastline is repeated across the several shapefiles but to varying levels of ...
1
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2answers
35 views

Merging a .csv file with a .shp file in R

I am trying to merge a .csv file with a .shp file. The shapefile has more information that I need so I also want to limit it by only adding information for the counties in my csv file. I tried my code ...
1
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1answer
81 views

How to append OS MasterMap Feature Class to the Feature class in PostgreSQL database

I have my Enterprise Geodatabase as PostgreSQL. I want to keep OS MasterMap data on the Geodatabase and would like to update it whenever a new tile is downloaded. However, I am struggling to find a ...
2
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1answer
764 views

Code to merge files in subdirectories not producing expected result using ArcPy

The short python code below is intended to merge a series of files (GIS files) which are contained in a series of subfolders. import arcpy import sys import os PointsMerged = r"C:\GIS\...
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1answer
28 views

Better resolution of my raster

if I am merging my raster files or if I am creating a virtual raster, the quality is not as good, as the input rasters on their own. Before: As a virtual raster: Does somebody know any tips or ...
1
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1answer
314 views

Merging multiple non overlapping raster layers into one layer

I'm working in Qgis 2.14 and have received multiple raster files for the Height of a terrain that combined covers the entire terrain I’m interested in. I would like to combine them. Because the ...
5
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2answers
2k views

Merging polygons that intersect by more than specified amount using PostGIS

I am working with a dataset that contains a subset of property boundaries in a local government area, thus my dataset is made up of several thousand properties but not all are touching. Since it is a ...
1
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1answer
43 views

How to specify fields to use in a merge

I am using arcpy to merge multiple feature classes from a list of feature classes. They all have the same fields. Let's say they all have the fields = ['CO_FIPS', 'MILES', 'FLOOD_ZONE', 'VALID', '...
3
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1answer
174 views

Merging many rasters with Python script within QGIS using GDAL?

I have many rasters that im trying to combine in order to produce contours. They are in the .bil format so I understand that i need to translate them using gdal first but none of my attempts have ...
6
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3answers
8k views

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 ...
1
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1answer
256 views

Merging two vector layers with different granularity

I am a beginner at QGIS. I have two vector layers. One represents country boundaries for the whole world. The other one represents region boundaries, but only for OECD countries. I would like to ...
0
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0answers
32 views

Add missing features to attribute table

I have two tables with complementing data in them. Both have an ID column (tree_ID). Table A is missing several features which are in table B. How can i copy only features from B to A which are NOT ...
1
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1answer
54 views

From several polygons of one layer to one polygon

I have imported one CSV file where I have zones of the city. Is it possible to get one big polygon of the city?
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0answers
40 views

Unable to Merge Multiple .DXF Files and Output .DXF Using Merge Vector Layers

I'm using QGIS 3.8.3 with GRASS 7.6.1 to merge multiple .dxf files into a single .dxf file. When I attempt to use the Merge Vector Layers via Vector>Data Management tools>Merge Vector Layers, I get ...
1
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1answer
45 views

Merging raster without add nodata value

I was trying to merge 2 DEM raster using QGIS raster - merge. Is there any way to not add nodata to the merged raster?
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0answers
47 views

Merging three different rasters

I am using QGIS 3.8 and I am trying to merge three rasters according to the scheme pictured on the attached screenshot. I tried many syntax expressions for the Raster calculator but I was unable to ...
1
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0answers
31 views

Merging features from different layers by field value in QGIS

I have various layers with polygons which each represent a land use class (e.g. "roads", "vegetated terrain", "water", etc.) These layers have fields which further classify the features' land use (e.g....
4
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0answers
55 views

QGIS geometry error:Hole lies outside shell

I am using QGIS 3.8 and I am using a layer from OSM of Tokyo city. The layer is consisted from many polygons and I have tried to merge it but I got error. This is how the original layer was look like:...
4
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2answers
1k 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) ...
2
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2answers
105 views

Transfer attribute and split line

I have two line dataset that represent the same roads: First one has very precise geometry Second one has an approximative geometry, but very interesting attribute. What I want to achieve is to have ...
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0answers
60 views

QGIS Error with Merging rasters

I'm using QGIS 3.8 with grass . I have 3 rasters that are located far from each other and I would like to merge them into one raster layer. I managed to merge 2 of them but the third one makes ...
1
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2answers
55 views

Merging .tif files downloaded from Google Earth Engine in correct order in Python

When you download a large image from Google Earth Engine, it is in multiple small images. Each sub-image name contains the x_min and y_min coordinates of that image. It is described here - https://...
1
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1answer
158 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 ...
2
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1answer
56 views

QGIS (merging, dissolve, union) lines of same name

I have street data where roads are segmented for no particular reason. I want to merge, dissolve or union whatever seems fit to make a single flat line. I H have tried above processes in QGIS but ...
3
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2answers
118 views

Merging two Landsat TIFF file of same band in QGIS 3.4

I've been wanting to merge two TIFF files of same band (this case it will be B1 in Landsat). I have followed tutorials which I came across online, but none of them seems to work. Generally, raster > ...
1
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0answers
69 views

Merge *.png files into one using GDAL

I built a Python script that downloads tiles from some map service. This service cannot be imported to QGIS as a tile layer so I decided to download tiles directly using requests module. The script ...
0
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1answer
36 views

Applying field mapping during Merge using ArcPy

I am trying to merge 10 stream feature classes together using arcpy. But I need to limit the number of fields in the output (all feature classes share the same fields). working_dir = r"C:\Projects\...
3
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1answer
419 views

Image classification for a study site falling over two adjacent Landsat 8 scenes using QGIS or ArcGIS Desktop

I will be using GRASS on OSX to classify Landsat 8 geotiff images to create a vegetation map for a study site that happens to fall over 2 separate Landsat scenes. I seek advice about which route to ...