To combine two or more parts into a larger whole.

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0answers
29 views

PostGIS: Merge any and all adjacent polygons

I would like to do adjacency tests on a parcel (polygons) layer and merge them if they fit certain criteria (could be size). Per the picture below, I would like to merge polygons 1,2,3 and 4, but not ...
-1
votes
0answers
19 views

Merging point and line features together into one [on hold]

I wanted to know can you merge different data types (e.g. line & point) together? If so how since the Merge tool doesn't allow for this.
2
votes
1answer
37 views

Combining many polygons from multiple datasets into one raster

I am a beginner in ArcGIS. I have a query regarding merging many polygons to form one big polygon, and then rasterizing it. The polygons are from varied datasets and represent different ...
2
votes
1answer
33 views

Merge tif files with python

I'm also having problems with running gdal_merge.py within another python script and I cannot run it. I already checked a similar problem here. My example is as follows: First I set my workspace and ...
2
votes
1answer
30 views

QGIS: 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. ...
1
vote
1answer
36 views

Problem Merging two line segments

I am using ArcMap 10.2 and merging several line segments with the same ID. Most of the time this works fine and I end up with one segment. (about 95% of the time) However, occasionally the segments ...
1
vote
1answer
36 views

Why does one polygon disappear when merging in edit mode?

I want to merge some polygons into one using the merge tool. But when doing so, one of the polygons just disappears (see screenshot 2). Why does this happen? When I use the simplify tool before, it ...
2
votes
2answers
130 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 ...
0
votes
4answers
43 views

How can I join all data of two raster datasets in ArcMap 10.2?

I have two raster datasets in ArcMap10.2. One is displaying rails and one that is displaying a 100m Buffer to both sides of it. My cellsize is 100x100m. What I want is to combine the rails AND the ...
1
vote
0answers
12 views

How to merge DMAs using QGIS — Creating Custom Regions?

What I am trying to do might seem basic, but bear with me as I am just hacking my way through a lot of this space. What i am trying to do: I am trying to create a new .shp file of custom regions. ...
1
vote
1answer
85 views

How can we merge the two selected features in a vector layer

I have taken one feature and find which are the neighbouring features to the feature which i have taken and then i have combine all those neighbouring features with my feature to make one feature. i ...
3
votes
2answers
126 views

Correctly merging DEM rasters and eliminating edge effects

I'm using 10m DEM rasters from the NRCS Data Gateway for a large portion of California. The problem is some strange tiling that appears after merging, but isn't present in the original data (before ...
3
votes
1answer
157 views

How do I merge DEM rasters correctly?

I've been struggling with this problem for awhile. Here is a curvature raster to illustrate the problem. I'm using 10m DEM rasters from the NRCS Data Gateway for a large portion of California. The ...
4
votes
1answer
100 views

Why are my 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 ...
5
votes
1answer
76 views

How can I match the cells of two rasters?

I have many raster files each one containing information that is different from the others (e.g. one contains information on rain, the other on altitude, and another on land use). The cells in each ...
1
vote
1answer
37 views

merging layers of raster data of the same format

My map consists of several different grid-layers lying right next to each other. I want to merge them to one single layer so that i can analyse my whole map at once. How can i do that?
2
votes
0answers
28 views

Merging Feature Classes and keeping the metadata

Is there a way that while merging two feature classes we can keep the metadata? We are merging feature classes with templates so we can import specific fields into our data. Is there a way to keep ...
3
votes
2answers
186 views

Merge geojson polygons with WGS84 coordinate

I have a Geojson file with some adjacent polygons and I want to merge them into one. I know it's a recurrent question but I can't find information for polygons with latitude and longitude coordinates ...
0
votes
0answers
23 views

Intersecting Polygons and merging rows in attribute table

I have 2 polygon shapefiles that I intersected, community boundary and electoral districts (ED). They do not fit into each other, I intersected them so that I would know how much of the smaller ...
1
vote
1answer
50 views

Merge artifacts and flow accumulation

I've been struggling with this problem for awhile. Here is a curvature raster to illustrate the problem http://i.imgur.com/IIjYAov.jpg I'm using 10m DEM rasters from the NRCS Data Gateway for a large ...
1
vote
1answer
32 views

Pyqgis How to merge all the active layers? or layers in the registry?

I was wondering if there is a way to merge multiple layers. I actually would like to merge all layers in the registry programmatically, all of them are point layers and have the same fields. I have ...
2
votes
0answers
73 views

Merge Raster Layers with Raster Calculator

I am looking to merge three raster layers together, we are only allowed to use the Raster Calculator tool in Spatial Analyst, ArcToolBox. Using ArcMap 10.2
1
vote
0answers
19 views

How to merge elevation from a raster image onto a shape road network with QGIS? [duplicate]

I have a shape file with Stockholms road network and a raster image with elevation data from the same area. Is there any way to merge the two somehow, either by adding the slope direction as ...
2
votes
1answer
61 views

How to merge shapefiles of two countries with QGIS [duplicate]

I want to merge the shapefile of Nigeria and Cameroon admin level 1. I downloaded the files from gadm but I cannot merge the files with QGIS or find a shapefile of Africa having countries at states ...
2
votes
1answer
87 views

ArcGIS “Merge” tool is slower on arcpy than when starts it with ArcGIS interface

I am writing python script on ArcGIS 10.2.2 and found some strange bug. I use merge tool to process 498 shape files (they are located on a hard drive). Using arcpy script it takes 6 minutes, but when ...
1
vote
1answer
27 views

Why am I getting small float numbers when aggregating points containing large integer values in QGIS?

I have a layer of points containing the centroids of European NUTS regions at NUTS 3, with population data in the atttribute table. I want to aggregate this population data to NUTS level 1, which is ...
4
votes
1answer
156 views

Fixing orphaned holes in R

I'm trying to perform a union on a common field after merging two adjacent shapefiles. The shapefiles end up with at least one thin sliver of space between them. When I attempt a union I get the ...
1
vote
1answer
85 views

ArcPy FieldMappings syntax using Merge tool

I'm working on script that takes several table results from the Zonal Statistics As Table tool and merges them into a single table. When merging I encounter the issue that the exported .dbf files have ...
3
votes
1answer
65 views

Merge different Landsat scenes in Grass GIS

I am new to Grass GIS, and I really need some help in solving this issue. 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 ...
0
votes
0answers
48 views

Merging contour lines generated by gridded data

I have a set of gridded data, which I have used to generate contour lines based on separate values in the data. In the example provided the contour lines shown correlation coefficients. The contours ...
2
votes
3answers
127 views

How can I convert a set of ShapeFiles to an OSM file?

How can I convert a set of ShapeFiles to an OSM file?
2
votes
0answers
91 views

Failing to merge rasters in QGIS

I am new to QGIS but have some familiarity with other GIS software (namely ArcGIS). I want to merge a number of LiDAR digital elevation model (DEM) tiles (specifically, 30 individual tiles) to ...
2
votes
3answers
54 views

Mosaic to New Raster tool fail

I'm trying to merge 24 DEM files, after applying the tool (Mosaic to New Raster) only 11 out of the 24 merged. All the original files are in the same projection, pixel type, band, etc. I also ...
3
votes
1answer
62 views

Merging .dbf Tables in Python w/o merging all fields of same name

I'd like to merge several tables together using Python. They all have the same field names: "TIME", "X", "Y", and "VALUE". I would like the "VALUE" fields to remain separate when merged, so that the ...
1
vote
1answer
261 views

Merge ascii files in Arcmap

I have multiple .asc grid files, I need to merge these into one raster grid file. I would like to know the procedure to merge .asc files.
2
votes
2answers
46 views

Combining edits from multiple Geodatabases into a Master Geodatabase

Is there a way to automate combining edits from multiple, single project geodatabases into a master geodatabase based off the date the edits were made without creating duplicated of the same project ...
0
votes
1answer
31 views

How to merge attributes fields and their values into a single table using a common key with FME

I am having difficulties with a relatively simple task. I have multiple transformers which append an attribute to an "ElementID" coming from different transformers. I would like to merge all outputs ...
1
vote
1answer
185 views

How to merge Shapefiles from multiple folders into Geodatabase Featureclass?

I have a question regarding the merge of a lot of folders, which has a lot subfolders, which has the shapefiles stored. I would like to merge all those in one geodatabase. So I thought to use a ...
2
votes
0answers
17 views

Processing Toolbox, avoid using empty layer

I have a process (on the processing Toolbox) I need to reproject and merge two layers (result of previous operations). Sometimes, one of these layers will be empty, in that case it is not necessary to ...
4
votes
2answers
212 views

Merge uniquely named point shapefiles in 50,000 different folders into a single layer

I have point shapefiles in 50,000 different folders (each shapefile file name is unique) - about 33,400 shapefiles (not all folders will have a point shapefile). I like to open the point shapefile in ...
1
vote
0answers
195 views

JSTS : Union on polygons with holes

Hi all, I'm trying to union two polygons (see above) with JSTS. My first polygon contains an hole, and my second polygon fill partially this hole. The expected result is a unique polygon with two ...
2
votes
0answers
54 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 ...
2
votes
0answers
73 views

How can I merge adjacent polygons and return all (adjacent and not adjacent) as Multipolygon?

I have a postgres database with administrative boundaries and their geometry. Each of those boundaries have an ident number. What I want to achieve: First I want to select all rows which are ...
2
votes
1answer
162 views

Merge feature classes in feature datasets

I'm trying to merge a group of like feature classes which are contained within separate feature datasets. I can merge feature classes within a file geodatabase without having issues by creating a list ...
1
vote
2answers
92 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 ...
1
vote
0answers
25 views

How do I change the order layers are displayed in in MMQGIS?

I am dealing with hundreds of different layers, all of which have one of 6 names - not by choice, that's just the way they show up when I import them. I am trying to merge all those with the same ...
1
vote
1answer
67 views

Merging vector layers using QGIS? [duplicate]

I have dozens of vector layers that I want to join together in QGIS. They have identical fields. How do I do this?
0
votes
0answers
55 views

ArcPy select and merge dropping records from table?

I'm working on a python script for ArcGIS using the arcpy module. I have ArcGIS 10.1 and Python 2.7 on Windows 7 machine and using Notepad ++ and IDLE to run it. The script selects specific records ...
1
vote
1answer
177 views

Writing multiple file geodatabase tables into csv file with arcpy

I was asking a question about Merging geodatabase previously, (link: Merge from arcpy.ListTables() producing duplicate rows?) and although the script worked, it took more than 9 hours to run when ...
2
votes
1answer
250 views

Merge two geojson files

I have a global json files about countries' boundaries but the Russia is in two parts (two polygons). I want to merge the two parts in one, without the boundary at the middle. Is there a way to ...