To combine two or more parts into a larger whole.

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2
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0answers
31 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 ...
2
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0answers
92 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
2
votes
1answer
83 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
0answers
122 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
2answers
47 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 ...
2
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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 ...
2
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0answers
56 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
100 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
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0answers
141 views

Joining nearest neighbor small polygons using R

The figure shows a plot of numerous polygons (zoom in) made from a raster file by require(sp) require(raster) pol100 <- rasterToPolygons(r, fun=function(x){x==1}, dissolve=FALSE) There polygon ...
2
votes
0answers
183 views

Image classification for a study site falling over two adjacent Landsat 8 scenes (qGIS or ArcGIS)

This question concerns work-flow rather than specific methodological problems. I will be using GRASS to classify Landsat 8 images to create a vegetation map for a study site that happens to fall over ...
2
votes
0answers
55 views

Merging Layers and assigning different values [duplicate]

Possible Duplicate: Merging Two or More Layers I am working with three clipped layers that are shown in the TOC. I created these layers from a large watershed shape-file. However, each ...
1
vote
1answer
153 views

how to use union tool for merging more than two layers?

I want to combine different layers into one but I still want to identify different layers in the new combined layer. Union is best for this, but it doesn't allow me to combine more than two layers. I ...
1
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2answers
136 views

How to make digitization more detailed afterwards with QGIS?

I digitized already two areas, bordering each other on one side. Than I realized, more detail was needed! What do you suggest as a fast way to do so? Adding each time new dots/verteces takes so ...
1
vote
3answers
597 views

Merge Zip Codes to Create new sales Markets

Let me preface this question by saying I am very novice with respect to GIS. With this in mind, I am looking to merge zip codes into sales territories. Instead of plotting data by zip code, I want to ...
1
vote
2answers
88 views

Python scripting for feature classes (loop, sort, merge, and replace)

This is what I have to accomplish using a python script for ArcGIS 10.1: Loop through all feature classes and first add a field, then write the name of the feature class into the added field. Merge ...
1
vote
2answers
162 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
1answer
224 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 ...
1
vote
2answers
187 views

Merge Error: Not Enough Memory

I'm attempting to make a flood plain map for a school project, and am using FEMA Flood Hazard Symbology for the legend. I've dissolved by a Flood Zone Field, but am left with two attributes both named ...
1
vote
2answers
586 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 ...
1
vote
1answer
219 views

Python code intended to merge files in subdirectories… not producing merged result

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 = ...
1
vote
3answers
2k views

What is the problem with the merge shapefiles tool in QGIS?

I'm having trouble merging shapefiles in QGIS. I'm using plugin ftools 0.6.1 and I get this: Any workarounds someone may know of? Thanks
1
vote
1answer
15 views

Eliminating pixels of a Merged image

I need to change the value of pixels that where created in an image as a result of merging 2 rasters, this new pixels have a value of 0. The problem is, that there are pixels with 0 in the original ...
1
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1answer
43 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
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1answer
73 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 ...
1
vote
1answer
454 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.
1
vote
1answer
370 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 ...
1
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1answer
116 views

ST_Union to merge tables containing lines?

I have to build a street network with Postgis that will be used with pgrouting. I have two tables: 1) the_network (182 lines): is a MULTILINESTRING table. Having columns road_name (varchar) / ...
1
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1answer
32 views

How I can merge different objects of a theme by equal meaning of one attribute of a field (ArcMap)?

Could somebody advise, how I can combine (merge) different objects of a shp theme with equal meaning of one attribute of a field (in ArcMap)? I have shp theme with many objects, in the field "A" some ...
1
vote
2answers
257 views

Merging many map sheets together into one large sheet for later georeferencing?

I have hundreds of images, each one is a scan of a map sheet, and I want to georeference them. The maps cover a large area (a whole country), they just split the area into many smaller cells. Each map ...
1
vote
1answer
378 views

How to create a 4 band image from an RGB and a grey scale image?

I have an RGB image and a Gray scale image. I would like to merge them in a 4 bands image. How can I do that? Is there a simple way to do it from QGIS or I have to modify the image before to load them ...
1
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1answer
262 views

Merging data in Quantum GIS

I have a set of postcode boundary data that currently goes down to the most detailed level possible, like this: AB1 2CD I would like to 'simplify' the data so that it just shows the first part of ...
1
vote
4answers
5k views

Merging multiple .tab files?

I was wondering if there was a quick way to merge multiple .tab files together? I have about 100. Would appending one tab to another with the MapBasic window open, then changing the name of the table ...
1
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3answers
5k views

Merging Two or More Layers using ArcGIS for Desktop?

I am working with three clipped layers that are shown in the TOC. I created these layers from a large watershed shape-file. However, each clipped layer includes the layer before it and only expands on ...
1
vote
1answer
289 views

problem after merge shapefiles, can't show it on OpenLayers with GeoServer

I have 5 .shp files, after merge it with geomerge, I can't use it on OpenLayers with GeoServer. it's only show white layer and when i click it, it show error message: Internal error occurred ShapeType ...
1
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1answer
41 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?
1
vote
1answer
29 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 ...
1
vote
1answer
97 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 ...
1
vote
1answer
84 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?
1
vote
1answer
128 views

Possible to run “Merge shapefiles to one” algorithm from Python script?

Developing a python script in QGIS 2.2, I can run algorithms from the Processing plugin fine such as those from QGIS geoalgorithms and SAGA. Can you do the same for the algorithm "Merge shapefiles to ...
1
vote
3answers
255 views

How to merge overlapped shapefiles without one layer's overlapping area?

I created a forest type map from 50 scene satellite images as shapefile under the following conditions. Some shapefiles are overlapped, because scene overlaps each other. There is an order of ...
1
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1answer
129 views

ArcGIS10.2 Data Merge error: 000732

I am running python in the ArcGIS python window. ArcGIS shows error message when trying data merge from arcpy. File "", line 1, in File "c:\program files ...
1
vote
1answer
43 views

Strategies for managing (and ultimately merging) duplicate business locations in a spatial database

I am working on a project right now that involves using multiple (very large) "location directories" to identify with the highest possible inclusiveness, a diverse set of business locations. These ...
1
vote
1answer
96 views

Merging more than two shapefiles in QGIS

I want to merge 9 shapefiles (all polygons) into one file. The problem is, when I try to merge more than two files at once, I seem to loose attributes on the way? Is there any other way of merging ...
1
vote
1answer
359 views

Merge multiple geometry type TAB files in QGIS/OGR

I have a number of vector layers with all types of geometry (point, line/multiline, poly) and I want to combine them into a single layer in QGIS. I know MapInfo can do it but with the other 99% of my ...
1
vote
1answer
58 views

edit aggregate polygons

i have one file, with 32000 record ,its polygons for city ,when i want to merge some polygons for get one rooftop polygon from many polygons ,this new polygon remove or it's have unwanted lines ...
1
vote
1answer
89 views

CAD to GDB import using ValueTable function

I have several CAD files (DWG) that I want converted to Feature Classes within a file GDB. Each feature class will be based on a polyline attribute "LAYER" value, so I have a query filter applied ...
1
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1answer
117 views

gdal_merge Sum/Agregation files into single output band

I need to create a single tiff files from several others (each have the same extent and resolution) and the output file need to have a single band containing the aggregated/sum of the values in the ...
1
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2answers
320 views

unionize intersections of merged polygons

[Updated quesion] I am using the following code to merged polygons from shapefiles for the purpose of calculating the surface area; library(maptools) library(rgdal) library(rgeos) #enter slots, ...
1
vote
1answer
68 views

problem in merging adjacent address polygons in qgis

I am having 15 polygon shape files of a sub locality of a city that is having address in their attribute table. I want to merge these polygons based on the address in the attribute table?how can i do ...
1
vote
1answer
337 views

How to “Merge Selected Features” with python?

I have been looking for the answer to this question for some time now, but can't seem to find it! My problem is straight forward: I have one layer It contains lots of features (only polygons), say ...