To combine data from different files

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4
votes
1answer
127 views

Merge polygon without attribute (in field) with nearest polygon with attribute

In the image you can see districts in BLUE with attributes (name of district) and small pieces in RED. The red polygons belong to the blue and I want to merge them. The RED are only towards the ...
1
vote
1answer
114 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 ...
2
votes
2answers
139 views

Merge point features within a given radius [duplicate]

I have a file in QGIS with 5000 points. Some of the points are really close to each other (5m). How can I cluster the point features to one point feature if they are within 5m? The new points should ...
1
vote
0answers
223 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
150 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 ...
1
vote
1answer
30 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
1answer
63 views

Merge two vector layers with different granularity

Beginner at QGIS here. I have two vector layers. One represents country boundaries for the whole world. The other one represents region boundaries, but only for OECD countries. I would like to ...
0
votes
1answer
156 views

Merging Multiple Paths

Alright, I'm going to start by using Google Earth terminology because that's where the original need for a solution came up. I have multiple paths (54) that I want to merge into a single path. ...
0
votes
1answer
237 views

ARCGIS 10- Cutting down a tiff file layer to a smaller polygon?

I have a dynamic land map featuring open forest, closed forest ect of an area which is a tiff layer file. I want to be able to cut the layer file to my area of interest, the polygon I created? I also ...
1
vote
1answer
167 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 = ...
3
votes
3answers
241 views

A linestring merger algorithm

I'd like to merge linestrings which touch, but do not cross. The linestrings share the same SRID and come from a PostgreSQL 9.2/PostGIS 1.5 database. Within the table I query are several line strings, ...
3
votes
5answers
1k 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
4k views

How to Merge/Dissolve Polygons By Common Attribute Field in QGIS?

I have joined corresponding Local Enterprise Partnerships table data into a polygon shape file containing UK Local Authorities. How do I Dissolve or Merge the the Local Authorities polygons by ...
4
votes
1answer
244 views

How to join data from NHGIS to make choropleth maps in R/ggplot2?

I have downloaded shapefiles of county/state boundaries and census data keyed to those shapefiles from the NHGIS. Both the shapefiles and the census data have a GISJOIN column to be used for merging ...
1
vote
1answer
103 views

Merge Two Polygons Using Editor merge in arcGis

i want to create a ArcEngine function using .net that allow to do the same thing like (see picture): select 2 polygons click merge Is there somebody who can help please!! Sincerely
3
votes
1answer
656 views

How to merge several google map images into one?

I want to have a high resolution aerial photo of a catchment area. I took some images from google maps and georeferenzed these and saved them as a layer file. but how can I merge them now that I have ...
1
vote
2answers
186 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 ...
0
votes
0answers
107 views

How to merge raster quadrangle tiles in qgis?

I've downloaded some dem tiles from here http://www.granit.unh.edu/data/search?dset=dem/dem174, which I'd like to merge into a single smooth digital elevation model usinq QGIS. So far I've tried ...
3
votes
1answer
325 views

Merging partially overlapping polygons into a table in PostGIS

I have a couple of tables (three) with polygons (landuse coverage in this case). Within each table, there is no overlap, but between tables there might be a lot of overlap. I would like to combine ...
0
votes
1answer
925 views

How can to merge DEMs in ArcGIS for Desktop 10.2?

I'm trying to merge some dems downloaded from USGS. When I used arcgis 9.2 there was an expression to be used in raster calculator to do that. I used it again but unfortunately it doesn't work in ...
1
vote
1answer
62 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 ...
0
votes
0answers
75 views

QGIS merge rasters error

I've been trying to merge some raster tiles at work and I've been getting an error message saying I don't have the correct permissions. This works fine on my home pc. Any obvious reasons for this? ...
2
votes
1answer
90 views

Merging and snapping Tiger line files

I have several adjacent (county level) TIGER road files. I want to merge them and create one contiguous file of snapped roads for the purpose of doing network analysis. Merging them is easy but ...
0
votes
1answer
326 views

How to batch merge rasters using FOSSGIS tools?

I'm working with QGIS 1.8 (gdal 1.9.2) and GRASS 6.4.3...but on Windows 7. I "just" want to merge my raster. I've got a folder with 50 GTiff raster from Lidar data. The aim is to merge raster ...
2
votes
2answers
579 views

Merge lines with the same 'name' attribute on QGIS?

I have a shapefile with a few thousand lines, each is a street segment. I'd like to merge all features with the same 'streetName' attribute into a single attribute. I only really care about the name ...
5
votes
3answers
644 views

Which is more efficient process in ModelBuilder - Merge/Dissolve or Union/Diissolve?

I'm creating a model which combines four very large files and dissolves them. At the moment, my workflow uses the Merge tool and then the Dissolve tool. However, I was wondering if using the Union ...
0
votes
0answers
59 views

Unwanted lines when cutting & merging polygons

I am using QGIS version 1.8.0. Sometimes when I cut or merge polygons I get unwanted lines left in them. On zooming in to them they do not appear to be slivers. Is there a way of getting rid of these ...
2
votes
2answers
80 views

What is the difference between mosaicking and merging?

What is the difference betweem image Mosaicking and Merging?
1
vote
2answers
3k 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 ...
0
votes
4answers
981 views

How to merge 48 separated US States layers into 1 layer, using MapInfo?

They are Census Block layers. The person on the website separated them into states so they can be download easier. I uploaded each states separate layer into MapInfo. Now I need to merge the files ...
1
vote
1answer
256 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 ...
3
votes
1answer
288 views

ArcPy merge datasets with slightly different fields

i have many (>15) shapefiles which have slightly differing fields. s1: (Name, age, layer_1, ...) s2: (Name, age, layer_1, layer_2, ...) ... s_n: (Name, age, layer_1, layer_1_extra, ...) I want to ...
3
votes
2answers
336 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
1answer
198 views

st_linemerge does not work

I have two LINESTRING's which intersect by checking with st_intersects. Then i try to collect/union both linestrings into one Multistring, then try to merge with st_linemerge, but it fails with: ...
1
vote
1answer
635 views

How to merge multiple ADF files to a single shape file? [duplicate]

I have a set of adf file which use the same structure. How can I merge all ADF to shp file? Does the ogr2ogr command can help in this case?
3
votes
1answer
531 views

How to merge Waypoints from many GPX files?

I have a large number of Waypoint-layers (gpx) and would like to merge them. Is there a way to do so using QGIS? Thank you!
1
vote
1answer
261 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 ...
1
vote
3answers
283 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
vote
2answers
125 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
1answer
129 views

Arcpy CreateUniqueName usage: keep original input names

This is a continuation of the question I asked here: At this point I'm really just trying to get everything in one place and keep the original shapefile basename. I'll tackle merging like-named ...
3
votes
2answers
144 views

Merge two geodatabases with identical structure

I'm using an ArcGIS addon which stores all created data (shapes and tables) in a gdb. The addon is made for single user use but to safe time I want to split the work with someone else. After that I ...
2
votes
1answer
3k views

How to combine (join?) two overlapping polygons to determine combined area they cover?

How do I combine (join?) two overlapping polygons to determine the combined area they cover in ArcGIS 10? I am sure the Geoprocessing tools can do it, but just how eludes me.
0
votes
1answer
334 views

ArcGIS 10 - Model for batch select polygons by attribute and merge them together

Is there is a way to create a ArcGIS 10 MODEL to: 1. batch select polygons from the same layer by attribute 2. merge these polygons into one 3. repeat this for all polygons shearing the same ...
5
votes
1answer
673 views

Using ArcPy to batch merge based on shapefile name?

ArcGIS 10 SP4 Python 2.6.5 I have quite a few shapefiles that are in many different directories. I'd like to pull out groups of like shapefiles, merge them, and move the results into a FGDB. I've ...
3
votes
3answers
116 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 ...
-1
votes
2answers
197 views

styles when merging shapefiles in qgis

Trying to create something for mapstory.org It wants it in all one shapefile. So I create a polygons and lines (with time attributes) in qgis 1.8 Then merge them all into one shapefile, how can you ...
4
votes
1answer
870 views

How to merge many shapefiles in different folders?

Directory structure is basically as such: county\City\prep\POI\Completed\C1, ...C2, ...etc\ I'm trying to write a script to go through the *\Completed*\POIS.shp and merge them all together, at a ...
2
votes
3answers
170 views

How can I merge a LOT of polylines automatically?

I have lots of MultiPolylines, three-dimensional arrays where the bottom level is an array of lat/lngs, the second level is an array of those points (a single polyline), and the top level is the group ...
1
vote
2answers
553 views

Problem creating TIN from multiple contour shapefiles with ArcGIS 9.3 Spatial Analyst

I have about 20 shapefiles that contain contours lines, and I'm trying to convert them to one TIN using Spatial Analyst in ArcGIS 9.3. I included all of the SHP's as input to generate a TIN, but it ...
1
vote
1answer
449 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 ...