To combine data from different files

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1answer
97 views

QGIS 2.2 Raster Merge losing color data

I'm trying to merge a couple of GeoTiff maps using Raster > Miscellaneous > Merge but the merge is only coming out in grayscale. The geotifs are using palettes color. How do I get the merge to keep ...
2
votes
1answer
28 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
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1answer
15 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
54 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 ...
4
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2answers
155 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 ...
2
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0answers
14 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 ...
0
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0answers
15 views

QGIS merge selected features tool malfunctions due to geometrical errors [duplicate]

The issue occurs using the 'Merge Selected Features' tool when there are geometrical errors in the features (not all are picked up by the 'check geometrical validity' tool). In 2.2 Valmeria, the ...
1
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1answer
80 views

merge rasters with nodata cells

I want to create single attribute table base on multiple overlapping raster. Some raster do not overlap completely but have common areas. In that situation I need the value from other raster while ...
1
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0answers
71 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 ...
1
vote
1answer
512 views

Merge multiple feature datasets while maintaining shapefiles for respective point, line, and polygon files nested ArcGIS

I've been doing some digging and a few days of playing around with my data in ArcInfo but I haven't been able to find a solution to merging datasets, which consist of many different point, line, and ...
2
votes
0answers
46 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
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0answers
30 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 ...
3
votes
1answer
301 views

In PostGIS, how do I merge a multilinestring into a single linestring, keeping the pieces in proper order?

I have a multilinestring made up of several pieces, some of which are facing the wrong direction. (Accessible here: http://pastebin.com/89Zcixv5 ) I think what I'm looking for is some utilization of ...
0
votes
2answers
2k views

QGis: Merge intersecting polygons into one which are part of the same feature

I'm not a GIS professional so I hope I use the correct wording, at least I hope you understand my question. Let's say there are 5 polygons in the feature A. In the shape file there are more ...
1
vote
1answer
67 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 ...
2
votes
1answer
43 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
33 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
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0answers
23 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 ...
0
votes
1answer
35 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
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0answers
28 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 ...
0
votes
1answer
111 views

Geoprocessing>Merge and arcpy.Merge_management() producing different results?

In ArcMap 10.2.1 I have three feature classes in geodatabase "MyGDB.gdb". Let's call the feature classes "A", "B", and "C" respectively. I am merging the feature classes using Geoprocess > merge. ...
1
vote
3answers
241 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,
1
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1answer
64 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 ...
0
votes
1answer
69 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 ...
2
votes
1answer
56 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 ...
0
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0answers
41 views

How can you calculate the union/merge two polygons in 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 ...
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 ...
1
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2answers
137 views

Merging multiple rasters with 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 ...
0
votes
0answers
63 views

How to keep all the unique columns of the shapefiles after merge?

Writing a script where the user is asked to select a directory which contains Folder_1 and Folder_2, both containing shapefiles and run various algorithms. The basic logical process of the script is: ...
2
votes
3answers
88 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 ...
0
votes
0answers
31 views

QGIS-Merge or create virtual raster files without losing definition?

I am new to QGIS and relatively new to GIS (so please be aware I am not that familiar with a lot of technical terminology). I am trying to merge several tiff files as either a virtual raster or a ...
3
votes
3answers
112 views

Automated way to join

I have river networks (polyline) of several adjacent countries as shapefiles that almost match up at the borders, but not quite. Is there any way to automatically connect them to a consecutive river ...
4
votes
1answer
327 views

How to merge shape files with attributes from a python script in QGIS?

I have some shape files. They are all the same kind of shape and all have the same attributes. If I wanted to merge them manually the "Vector/Data management tools/merge shape files to one" works ...
0
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2answers
46 views

Make lists of shapefiles using loop

There are the following shapefiles in workspace. L01-1983_01.shp L01-1983_02.shp ... L01-1983_46.shp L01-1983_47.shp L01-1984_01.shp L01-1984_02.shp ... L01-1984_46.shp L01-1984_47.shp ... ...
2
votes
1answer
103 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
1answer
52 views

Merge Shapefiles using a loop

I'm a new user of ArcMap. And I'm not good at programming language. There are the following shapefiles in workspace. L01-1983_01.shp L01-1983_02.shp ... L01-1983_46.shp L01-1983_47.shp ...
1
vote
1answer
395 views

Merging OSM files with OSMOSIS and import to Postgres with OSM2PGSQL

I have a problem merging and then importing two OSM files. I downloaded to distinct .osm-files from cloudmade. They are not sharing any geographical attribute (as the first is the country Monaco, the ...
1
vote
3answers
49 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 ...
3
votes
2answers
128 views

Merging DEMs of different grid size

I'm trying to merge two grids with different cell size. One has a cell size of 10m and the other 50m. The 10m one covers a subarea of the 50m one. I know that the most accurate one is the 10m one and ...
0
votes
1answer
76 views

How to create a grid after merging shapefiles?

Follow up question to QGIS Model Builder Script - Possible to merge layers in a folder? I think I'm missing something very obvious here but can't seem to find it. After merging shapfiles in a folder, ...
1
vote
0answers
47 views

Merging shapefiles to one, rearrange columns?

I am trying to merge two shapefiles which both contain polygons representing properties in QGIS 2.2. One problem is that the names of some of the columns in the attribute table differ between the two ...
0
votes
0answers
24 views

Things to consider while and after merging DEM-Tiles?

In some tutorials it is said that after merging you should stretch the “histogram to full dataset” (also mentioned in the QGIS Training Manual). Is there anything else you would suggest doing after ...
0
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0answers
11 views

Do I get the same result when merging and clipping DEM geotiff files using different steps?

I merged and clipped 12 GeoTif Files with GMTED2010 Data (15 Arcsec) obtained from Earthexplorer to get a large map covering Europa and the Near and Middle East. First I tried Variant A) Raster – ...
0
votes
0answers
52 views

Why does merge/mosaic four DEMs into one give ERROR 01042?

I'm unable to merge 4 dems into one using ArcGIS Home 10.2. Raster Calculator, adding them, gives me the error: RuntimeError: ERROR 010422: Error in processing the environment mask. I created a ...
0
votes
2answers
47 views

How to set Merge output as Select Input in ModelBuilder?

I'm using ModelBuilder. I tried to take the Output from the Merge tool as Input to the Select tool. But it doesn't work. I'm trying to Merge 90 Shapefile lines into one. Then "Select" some features ...
0
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1answer
192 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
144 views

How to merge hundreds of vector layers and sum attributes in QGIS?

I'm still at a fairly beginner level with QGIS and I've been banging my head against the wall trying to figure this out, so I would like to turn here for the internetz help. I am trying to construct ...
3
votes
5answers
932 views

Automatically download and merge webmap tiles into one big image?

Is there an easy way to download a bunch of web map tiles (in /z/x/y.png format) and stitch them together into a single large image? I could probably script this using ImageMagick, but would prefer ...
1
vote
2answers
72 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 ...
7
votes
3answers
252 views

Merge images first, or georeference first?

I'm wanting to georeference and vectorise some features from scans of the OS 1896 Town Plans that I have purchased from the NLS (http://maps.nls.uk/os/london-1890s/info.html). The scans provided are ...