To combine data from different files

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2
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0answers
52 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 ...
4
votes
1answer
813 views

merge selected features and programming

I have a shape file with UK districts and unitary authorities. In the past, using commuting patterns, I worked out a new geography which is close to travel to work areas. I now would like to create a ...
1
vote
1answer
271 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 ...
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votes
2answers
2k views

Is there a difference in performance between Merge and Append in ArcGIS?

Often I find myself in a situation where I don't care whether or not my tool produces a new feature class, but I do care how long it takes to combine all of my large datasets. Does it take longer to ...
9
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1answer
2k views

Merge Multiple Tables into a New Table in PostGIS

I am looking to merge a number of individual tables into a new table in PostGIS. This is an easy task when working with Shapefile data, but I am unsure how to do this in PostGIS. Any help would be ...
9
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2answers
9k views

How can I join several raster files using QGIS?

I'm new to QGIS. How can I combine multiple raster layers into one layer? The raster images are of different areas with very little overlap. The goal is to bring numerous town plats into one project. ...
7
votes
4answers
2k views

Open source software to merge large shape files

Some background: I have 2 polygon shape files with approximately 500,000 records each. The two files are identical in terms of field structure. Using ArcGIS 10.0 I can'nt merge these two files using ...
3
votes
2answers
701 views

Merging polygons that intersect by more than a specified amount

I am working with a dataset that contains a subset of property boundaries in a local government area, thus my dataset is made up of several thousand properties but not all are touching. Since it is a ...
3
votes
1answer
347 views

How to combine lines from different sources reperesenting the same road network but with slightly different geometry?

Here is my problem: I have got two layers of polylines which represent the same road network but they are from different sources and have different geometry. The two layers are mostly the same tracks ...
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0answers
98 views

Merge polygons into a single polygon [duplicate]

Possible Duplicate: How to aggregate detached polygons? Is there any open source java library to merge polygons? My use case is that i have a few building feature polygons close by. I need ...
2
votes
2answers
1k views

Modelbuilder: Needing to input multiple featureclasses into merge tool

So I have 490 point fc's in a single directory with uniform spatial features, field names/datatypes. I'm trying to figure out how to consecutively input the first seven fc's into the merge tool, ...
1
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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