Questions tagged [merge]

To combine two or more parts into a larger whole.

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Adding dbfs in ModelBuilder?

I have built a model in ArcGIS ModelBuilder for which the output is several dbfs having five columns. I want to merge all the output dbfs into a 'master' dbf sheet in the model itself. How would I ...
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21 views

Difference between merge and create virtual raster

I have the DEM of a defined region that has been split into sub-DEM with a resolution of 1 km x 1 km. When I merge the sub-DEM to create a single DEM (Raster -> Miscellaneous -> Merge), the overall ...
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10 views

Difficulties merging 2 raster data sets in QGIS 3.8.2 [duplicate]

I'm trying to combine two raster data sets, one from USGS Earth explorer SRTM 30m, the other is UK Lidar data, the SRTM 30m data being a subset (smaller area) of the Lidar data, as I'm trying to fill ...
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Layer converted into attribute

I am using QGIS 3.8. I am creating a geological map, and because I wanted to merge two different polygons, it created a separate layer. I want to convert this dissolved layer into the attribute to my ...
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1answer
39 views

How to dissolve overlapping polygons using GeoPandas

Assuming the following: from shapely.affinity import translate from shapely.geometry import Polygon import geopandas p0 = Polygon( [(0,0), (2,0), (2,2), (0,2)] ) p1 = translate(p0, xoff=1) p2 = ...
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1answer
43 views

Gaps in polygon after merging

When I use the merge tool on this polygon mesh, I end up with a multipart polygon with large gaps. Before this, I was getting an error when trying to run a merge or dissolve because of "Polygons with ...
4
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1answer
66 views

Merging three rasters into one

I need to merge 3 rasters into one, each raster is single banded and ranges from 0 to 1. The rasters overlap at some places. Below is how each raster looks like and how the output should look like ...
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32 views

Unexpected error merging three point shapefiles

I get the following error when I try to merge the files: The error says that there is an unexpected error. I have deleted the lock files and an empty ArcMap document. It still gives me this error.
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Problem merging/clipping MODIS rasters in QGIS

Im pretty new to QGIS and am having some trouble making a NDVI map for Mali. To cover the whole country I need 5 MODIS NDVI tiles, however every time I try to merge them I get a "the following layers ...
3
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1answer
47 views

Nodata value making holes in merged GeoTIFFs in QGIS?

I am trying to remove black borders around the edge of a GeoTIFF. The Black border around the GeoTIFF has an RGB value of (0,0,0). I have tried assigning 0 as a "No Data" value to the tiff, but QGIS ...
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38 views

Fill in gaps in QGIS shapes?

So basically, I've written a script that generates a lot of polygons over the UK with certain criteria. The output it a lot of shapes like the following - I wanted to know if, in QGIS, I'm able to ...
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37 views

Merging lines that DON'T touch in PostGIS?

After a specific demand in my work that needed to create a single line from two untouched geometries (lines), I needed to develop a function and follow for contribution: Passing as a parameter two ...
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1answer
22 views

Selection by Location on Raster, Using a Vector Layer

I'm trying to identify raster cells by location to eventually convert them to vector polygons, and then add them to an existing vector layer. Below is a picture to illustrate the problem. The green ...
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1answer
39 views

Merging polygons without losing area using ArcGIS Pro?

I have a shapefile with 23 polygons,I want to merge them and get the total area of this big polygon. But when I used "merge"tool, it only merge polygons but area. Any ideas about what I should do?
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24 views

QGIS How to retain symbology when merging layers?

I have a QGIS project with various layers for which I have assigned icons. When I import additional data layers and then merge these layers with the existing layers (and their symbology) a new layer ...
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0answers
21 views

Editing errors in shapefile

qgis version: 3.4.9-Madeira I am editing a shapefile. I want merge two adjacent polygon. Then, I run merge tool, and it comes like below picture. You can see some gap(?) or tail shape line between ...
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20 views

Merging satellite images error

I am trying to merge 3 satellite images of 3 times. The images are median images. I have used the following code but there is an error. var maskL8 = function(image_m) { var qa = image_m.select('BQA'...
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2answers
66 views

Joining the attributes of two nearly congruent streetnetworks (lines) in QGIS

I have two streetnetwork layers containing both different attributes, none of them is similar so I can´t do a simple join. Unfortunately they are not congruent, but the line objects are close to each ...
2
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1answer
32 views

Using data from 30-meter DEM map to fill into missing pixels in 8-meter DEM map

I have a DEM map of 8-meter resolution, where some groups of pixels are blank due to the clouds (I guess). Is there a way in ArcGIS or GRASS to fill into those null areas with data from 30-meter DEM ...
2
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1answer
54 views

Using shape to find and merge photos in FME?

We have a directory with over 300 aerial photos of our town. Every photo has an unique name. Using an georeferenced Esri shapefile of a specific area we want to copy the photos that are coverd by the ...
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1answer
25 views

Merge ImageCollections with different pixel size

I want to combine 2 different Image Collections (i.e. Landsat8 and Sentinel-2), and I want to combine them to a unique ImageCollection (and then run the function qualityMosaic()). However, they have ...
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1answer
33 views

Regroup multiple polygon with same attributes in one

After looking for an answer on some forums (without success :/) i post here in hope on of you can help me. I have a polygon shapefile with thousands of entities (=row) and >10 attribute column. A ...
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30 views

Using MERGE command in QGIS?

I am working on QGIS 3.4.9 with Mac OS Mojave 10.14.5 I have two DEM raster files and I would like to merge them. Unfortunately, an error occurs and I don't know what to do.
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1answer
123 views

Where did Merge go in Raster menu?

I am using QGIS 3.6.2-Noosa. Last time I merged rasters (a couple of weeks ago) I had options on the Raster Menu that are mysteriously gone now (I would merge via Raster>Miscellaneous>Merge). Now when ...
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0answers
38 views

Merging annotations in ArcMap?

How do I merge two annotations into a single part?
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1answer
23 views

Merging entities to existing feature class?

Do you have any idea how I can merge entities to an existing feature class that already has the same structure and not in an existing feature class as the ArcGIS tool proposes?
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0answers
58 views

Raster nodata = -3.4028234663852886e+38 [closed]

I'm very new to raster manipulation, and I'm getting a nodata value of -3.4028234663852886e+38 when importing USGS NED 1/3 arc-second n41w074 1 x 1 degree IMG using rasterio on Python. What is it ...
3
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1answer
79 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 ...
3
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1answer
71 views

Merging all vector files within directory with QGIS?

I am unsuccessfully trying to merge all shapefiles in a given directory using QGIS 2.18. I do not want to navigate to the folder using QGIS GUI tools. Instead, I want my script to include all ...
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0answers
25 views

QGIS 3.4 bug merging layers

I have some difficulties with the tool Merge vector layers (free translation from French). The result of the process is an empty layer of the line layers. It is strange, because I did it with two ...
2
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1answer
39 views

Batch reading features from many Geodatabases in R

I would like to learn to batch import from many geodatabases at once and merge the files together into a new unified shapefile. All of the GDBs and Features have a similar name and file structure. For ...
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2answers
44 views

Merging feature class with field mappings using datum transformation?

I suspect that there is no easier way to do this, other than developing this as a two-step process with a temporary output (which seems somewhat wasteful). If I have to, I'll just create a temporary ...
2
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1answer
173 views

How to merge geoseries to geodataframe based on geometry attribute

I have 5868 points in a geodataframe with some columns/attributes. Between points which have distance less than 10 m, I just want to select only one point as representation in that area. I have done ...
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1answer
59 views

In ArcGIS 10.6, How do I remove FID columns from automatically being created/inserted during Merge?

When I go to merge some polygons, it automatically adds an FID for each polygon as a column. It takes forever to go through and delete each FID for the output. Two questions: Is there a way to prevent ...
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1answer
34 views

Using Merge Tool in ArcMap?

I have two polygon layers which represent the same thing and I want to merge them to keep all the features in A and "fill in the gaps" with B. Should I be using the merge tool here? I'm using ...
2
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1answer
44 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 ...
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1answer
68 views

Union, merge, intersection, join layers - logical difference and clear explanation for QGIS

I note that there are answers available on the difference between join and merge (e.g., Difference between 'join' and 'merge'?) that link to ArcGIS resources as a reference. However, I ...
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0answers
47 views

Merging Degree Two nodes in Stream Network using QGIS 3.4

I have a stream network and I want to convert it in graph like data structure, for which I need to have precise set of FROM and TO vertices.The geometry of stream network is not correct i.e. the ...
2
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2answers
51 views

Merge shapefiles with unequal field lengths

I have several shapefiles in ArcMap that I want to merge together into one shapefile so I don't have to keep juggling them all. However, I can't use the Merge geoprocessing tool because it gives me a ...
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0answers
38 views

Merging layers to intersect and count (tally) multiple fields in QGIS?

My question is similar to Performing multiple layer intersection in QGIS? However, there are a few differences. I have run a test analysis on a dummy data set and cannot replicate the result with my ...
1
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1answer
39 views

Merging raster fail: only one raster in output?

I am trying to merge two rasters (.tif) in QGIS (Raster > Miscellaneous > Merge), but only one of the rasters is kept in the output. I need a 3rd rasters with the sum of the values from both input ...
3
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2answers
78 views

Merge shapefiles with common field

I'm trying to merge several shapefile layers. Each of the layers has three attributes: CGRSName: Name of the grid cell (same for each shapefile) CGRSType: explains the type of grid (not important ...
1
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1answer
79 views

Merging road segments into one road line in QGIS

I have a Shapefile with a road network (lines) which includes several road segments (lines). Is there any way to merge all these lines into one line using QGIS?
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2answers
77 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
38 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
68 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
67 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 ...
2
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1answer
73 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 ...