To combine two or more parts into a larger whole.

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2
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1answer
123 views

Are there any open source distribution raster merging functions within JTS or GeoTools

I'm looking for something similar to the combine function from the ISelectionSet interface from ArcObject's SDK 10 .NET framework on a more scaled down level. Ergo, I don't plan on using that ...
2
votes
1answer
72 views

Is there a version of merge in QGIS that works like “Difference”?

I can't seem to find a tool to merge files from the active TOC into one file... The datamanagement --> Merge Shape files only allows you to choose a directory of shapefiles to merge which is really ...
2
votes
1answer
310 views

merging TIGER Line shp files for better labeling in ArcGIS

When working with TIGER line shp data at county level scale the labeling of roads, rivers, railroads, etc. is cumbersome due to all of the tiny line segments. Merging the dozens of segments that ...
2
votes
1answer
36 views

Create random points in ArcGIS on a polyline in a polygon

I am trying to create 100 random points, 1 within 500m of 100 points I already have. I have created a buffer and can easily create 1 random point in each, but now I want those points to lie on a ...
2
votes
0answers
46 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. ...
2
votes
0answers
47 views

How to union linestring data distributed on multiple layers?

I have four shapefiles. Each contains a linestring as shown in the image. Each shapefile is represented as its own layer in QGIS. I would like to union these linestrings into one polygon which ...
2
votes
0answers
35 views

Trouble merging 2 rasters using qgis

I am trying to merge two rasters using the "merge" tool on Qgis 2.6. Qgis does complete the process, but the resulting image only shows one of the two rasters with the rest of the extent with really ...
2
votes
2answers
87 views

Shapes not matching number of records

I am trying to merge features (polygons) from 7 subregions in ArcGIS (v10.x). Merge goes fine but when I do any other process on it (e.g. Adding a field, calculations etc), the merged file is ...
2
votes
0answers
185 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 ...
2
votes
0answers
33 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
votes
0answers
117 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
98 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
200 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
55 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
votes
0answers
19 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
votes
0answers
60 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
125 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
0answers
152 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
332 views

Merge overlapping DEMs with irregular boundaries

I have a 10m DEM covering part of a state, a 20m DEM covering the whole state, and a 90m DEM covering the whole country. How can I merge them together, getting the best quality available in each area? ...
2
votes
0answers
208 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
56 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
175 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
vote
2answers
140 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
687 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
60 views

How to combine/merge *.lul files to shape format?

I got multiple files, say 2500, I never heard about lul files before. anyway I visualised it in QGIS after number of attempt in Autocad map 3d and ArcGIS. it is basically like Basemap:Road,parcels, ...
1
vote
4answers
195 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
2answers
175 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
267 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
326 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
256 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
743 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
254 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
29 views

Merge or dissolve line features based on two or more attributes

I am working in Arcmap 10.2 and I would like to do the following according to the example table below, but I do not have a clue on how to do this. I am working in ModelBuilder. Is there a tool for ...
1
vote
1answer
34 views

FME - How to merge geometries that they are in a distance of x meters?

I have a CAD file which I import in FME. I have two different geometries. A polygon and a point geometry. Each point geometry has some attributes which I want to pass to the polygon geometry. Both the ...
1
vote
1answer
21 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
vote
1answer
70 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
113 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
739 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
536 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
vote
1answer
146 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
vote
1answer
34 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
339 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
475 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
vote
1answer
269 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
vote
3answers
6k 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
298 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
vote
1answer
27 views

Adding multiple model outputs to merge tool in ModelBuilder?

I am using ModelBuilder to batch project multiple (site) specific geodatabases' contents then "Merge" like components into a single geodatabase. I have up to eight FCs for each site (e.g. parcels, ...
1
vote
1answer
27 views

Merge lines where point feature class exists

I have a polyline feature class and a point feature class. Two lines from the polyline feature class come together (in most cases they are snapped together) where a point exists in the point feature ...