Questions tagged [merge]

To combine two or more parts into a larger whole.

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678 views

Error message trying to merge Shapefiles in Python

I try to merge all Shapefiles from one folder together into one, using this: shapeList = arcpy.ListFeatureClasses() print shapeList for fc in shapeList: if fc == "*domain*": arcpy....
3
votes
1answer
648 views

FieldMap in Arcpy Merge for Selected Fields Only

I am trying to use FieldMap in arcpy to merge only a few of the same fields from 8 feature classes. There are many different fields in all of the different feature classes, but I have identified the 9 ...
3
votes
1answer
279 views

Merging different Landsat scenes in Grass GIS?

I am new to Grass GIS. I have 17 scenes from Landsat8 covering an area. I have created color infrared images of bands 5,4,3 and now I want to merge all scenes into a mosaic, for further analysis. I ...
3
votes
1answer
221 views

Automated merge of polygons up to a limit

I have a polygon feature class with a field, let's say it's population. I need to find an automated way to merge these polygons up to a given population number. E.g. I have polygons with population ...
3
votes
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 ...
3
votes
2answers
479 views

Merge two geodatabases with identical structure

I'm using an ArcGIS addon which stores all created data (shapes and tables) in a gdb. The addon is made for single user use but to safe time I want to split the work with someone else. After that I ...
3
votes
2answers
55 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.
3
votes
1answer
199 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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0answers
97 views

QGIS - Parallel Lines - Count length of one

I have a large layer of lines (telecommunication duct) with in parts several parallel lines that are close to each other (cause they lay in the same trench). I would like to count the length of the ...
3
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0answers
549 views

Merging asc files in QGIS?

I am trying to merge 8 .asc files using merge option in QGIS 2.4 but when I do that it makes like contour of the file when I want to merge the files together. .ASC Files: Result after merging:
3
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0answers
135 views

Tool for merging OSM and Google route data

I'm using google API in order to solve a routing problem; by giving it points of source and destination and demanding the route. Now I want to project the route on an OSM map. Is there any tools to ...
3
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0answers
63 views

How can I merge roads layers that do not align perfectly?

I have multiple roads layers for a given area and would like to merge them into one layer since they each have some unique roads the other layer does not show. However, the roads that these layers ...
3
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0answers
1k views

Merge succeeds but output missing? [closed]

I have problems with Merge tool. I can't find the output file in ArcCatalog even though I refresh it. Output is shown in Results window but nothign happens if I click Add to display. Strangely, also ...
3
votes
0answers
295 views

Keys for merging US state/county ANSI's with GADM Unique identifiers?

I've got county-level data from USDA NASS, and I want to merge it with gridded climate data. A preliminary step is the associate the counties with the coordinates of their centroids. If I merge by ...
3
votes
0answers
217 views

QGIS 2.12 LAStools lasmerge error: “no outputs specified” [closed]

I am trying to merge 4 .las files with "lasmerge" within "LAStools" in QGIS 2.12 running Windows 7 64. I keep on geting error "no outputs specified" even thoug i did specify the output folder and ...
3
votes
0answers
246 views

Create polygons from many small. Expand to include space between

I'm just a programmer without GIS-skills as such. Hence this question: Intro: I have a lot of polygons; actually each private-owned real estate in my country. I also have "counties" as polygons. In ...
3
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0answers
682 views

How can you calculate the union/merge two polygons with ogr2ogr?

I want to calculate the union/merge two overlapping polygons using ogr2ogr (as I have 300+ to do). I want the output to be the same as you would get if you used the 'Merge shapefiles to one' command ...
3
votes
1answer
58 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 ...
2
votes
3answers
477 views

Optimizing arcpy.da.Walk performance?

I'm trying to automate a workflow that currently costs a co-worker about 45 minutes. General run down is this person copies files from a network drive onto a local one, and process it through four ...
2
votes
2answers
517 views

Render polygons ordered by size

How can I merge shapefiles in a special order in QGIS? What I have and what I need to be merged in that order: What happens when using merge by mmqgis: As u can see not usable at all. Attributes are ...
2
votes
3answers
4k views

Can ArcGIS only merge two shapefiles each time?

I need to merge multiple point shapefiles (in the same directory) into one point shapefile. After inputting these shapefiles and merging it, I found the final output only contained the data from two ...
2
votes
2answers
861 views

merging raster aerials in QGIS issue

I follow the instructions here very closely and yet every time QGIS gets caught in a loop. It takes a few small rasters totally less than 100mb and creates HUGE gb files and will not stop until python....
2
votes
2answers
52 views

Merging multiple shapefiles into one NULLs out values

I am working in QGIS 3.4, and trying to merge 10 polygon shapefiles into a single shapefile. However, the result is not preserving the values for most of the shapefiles, it's NULL-ing them out for ...
2
votes
1answer
1k views

Which value does raster merge chose in overlapping area?

When using the 'Merge' tool in QGIS, which raster value does it choose when there are overlaps between the raster?
2
votes
3answers
171 views

Can QGIS merge CSV files with different colums? [closed]

I am trying to merge a month's worth of daily CSV files without using ArcGIS. Each file has ~25,000 entries so this is a high data load project. Sample data can be found here. Note that we are using ...
2
votes
2answers
4k views

How can I create a merged buffer in QGIS then count points that fall within it

I have a QGIS plan which shows ponds (as points in a shape file with an OS tile as a background) within a survey area. I need to calculate the total number of ponds within 1 km of each of the on-site ...
2
votes
2answers
700 views

Merging polygon slivers to largest adjacent polygon using ArcGIS Desktop?

I've got several hundred thousand slivers in my dataset as a result of cutting in a layer. Does anyone have a good solution as to how to have ArcGIS Desktop evaluate the position of each sliver and ...
2
votes
2answers
938 views

Using Python to execute merge of rasters

I need help with a python script to iterate merge (gdal_merge.py) of rasters: For each folder located in /home/geodata/sentinel2/ look in subfolder IMG_DATA and merge the three rasters with ...
2
votes
2answers
666 views

Fast way to merge 8000 raster?

I have to merge almost 8000 rasters (TIF). I tried using Mosaic To New Raster in ArcGIS 10.3, but it's processing really slowly and crashes quite often. Is there a faster (or more stable) way to ...
2
votes
1answer
773 views

How to merge single polygons to multi part polygons by maximum distances?

I have a polygon layer with a land-use class and ID for every polygon. How can I merge polygons (into multi part polygon) which do not adjoin, but are not further than x meters apart from each other. ...
2
votes
1answer
6k views

How to merge output shapefiles in model builder

I have a layer with several polygons and a road map. I need to take each polygon and use it to clip the road map, dissolve all of the road records into one, and then merge the polygons into one ...
2
votes
1answer
71 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 ...
2
votes
3answers
234 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 ...
2
votes
2answers
249 views

Merging attributes in QGIS? [closed]

I have a layer with several polygons making up a division together. They all have attributes with population. Is it possible to add up the population in a merge so I don't have to use a calculator ...
2
votes
3answers
1k views

Keeping leading zeroes in QGIS in big files

I am trying to load a file with many columns into QGIS. With both .txt and .csv format the leading zeroes of some data values get lost. However, I need the leading zeroes to merge the file with a map. ...
2
votes
2answers
7k views

Merging attribute and geometric features in QGIS?

I have polygons shapefile in which some of the polygons have same attributes as seen below:- In QGIS, how do I merge the polygons having the same attributes into one polygon? In other words, am ...
2
votes
4answers
1k views

merge overlapping polygons with spatialite

The green points, buffered by one of the point attributes, should result in the three areas outlined in red (a table with three rows): I'd like to do it in spatialite. How can I do that? If it's not ...
2
votes
2answers
2k views

problem combining geometries from all features in a layer as one geometry

I am trying to combine all features of a Polygon layer in QGIS in a python plugin, and am running into this error when I try to run the combine method: "AttributeError: 'NoneType' object has no ...
2
votes
2answers
2k views

How to batch merge shapefiles

I have a catalog tree with a number of subfolders. In every folder there is point and polygon shapefiles. What I want to do is for every type of shapefile point and polygon to do a merge by type. ...
2
votes
2answers
77 views

Correcting merged LiDAR DEM with outliers in inner edges?

I've created a DEM from LiDAR data. After combining all the files, I could see that there are some problems through the tile borders. This is an screen focused in one of the cross section of 4 files ...
2
votes
1answer
2k views

Using multiple tiff files as a data store in Geoserver

I have hundreds of tifs I want to use as a data store on my Geoserver. So many that QGIS won't merge them for me. I heard some about .vrt but I never found a clear source of information on the ...
2
votes
1answer
94 views

Selecting multiple polygons - which polygon is top of the merge list?

If you select multiple polygons, and then try to merge them, ArcGIS creates the dialog box showing the selected polygons (picture below). You can then double click the one you want the others to merge ...
2
votes
2answers
4k views

Merge consecutive GPX tracks?

Is there a (Windows) application that takes multiple, consecutive tracks, and merge them into a single GPX file? I tried deadware "GPS Track Editor", but neither Merge nor Join did the trick:
2
votes
1answer
128 views

Merge polygons based on five first digits in id

I have a shapefile with 1364 polygons in the Stockholm area: But the "areas" are too detailed - I want to make fewer and bigger polygons. I would like to merge/dissolve all "BASKOD2010" id's based on ...
2
votes
2answers
3k views

merging ecw images

Is anyone able to recommend a program/process/method for merging ecw images together. I have approximately 2000 ecw images (tile) that 1.5x1.5km each which together and put to combine them all ...
2
votes
3answers
1k views

Merging multiple rasters with the SAME spatial extent

So I began with lidar elevation data 1m resolution, and I performed a terrain analysis to extract specific ranges of elevation from the raster (1st picture is 0-1m elevation, 2nd picture is 1-2m ...
2
votes
1answer
490 views

Merge from arcpy.ListTables() producing duplicate rows?

I was trying to manually merge file geodatabase tables and was getting Null values for the output file rows and decided to write a python script to merge the files. Here's my script: import arcpy ...
2
votes
2answers
2k views

How to merge dbf files in Python or arcpy?

I have over one hundred dbf files to merge. Each of files have two columns: ID and another field which differs from one file to another. I want to merge those fields based on ID such that each raw ...
2
votes
1answer
765 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\...
2
votes
3answers
2k views

Merge Multipart Feature Line

I'd try to merge multipart feature line, but didn't work. would you please teach me how to merge multipart feature line? I work in version environmental and geometry network. Regards,

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