Tagged Questions

A vector data storage format for storing the location, shape, and attributes of geographic features. Often referred to as 'an ESRI shapefile', as ESRI developed it.

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1
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3answers
231 views

Exporting 2 shp layers to geojson using quantum GIS

I will explain with an example: I have 2 shp files for Tanzania. Tanzania inland waters http://www.diva-gis.org/data/wat/TZA_wat.zip Tanzania administrative boundaries ...
5
votes
1answer
181 views

How to determine optimal windmill placement to maximize production?

How can I add automatically the maximum number of points (dots) with 6m diameter and 100m distance each point from other into an area. The dots will present the windmill base (6m) and I want the ...
5
votes
3answers
186 views

draw shp files or kml files on ipad?

I need to be able to draw a polygon in the field while the landowner is there to approve it. Is there an app that is easy to use so all of the field hands can operate it? I also need to be able to ...
2
votes
0answers
50 views

Applying depth to Shapefile

Apologies if this question has been answered before. I'm digitizing a historic coastline and would like to add a single depth figure to it in order to merge it with a current contour model. Is there ...
3
votes
1answer
218 views

Any tools to convert GTFS (General Transit Feed Specification) in SHP / KML?

I need to convert GTFS (General Transit Feed Specification https://developers.google.com/transit/gtfs/reference), data in some GIS data format like ESRI Shapefile or KML or something else. Do you know ...
1
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0answers
103 views

How to use GDAL to burn a selected value from one raster into another?

I think this should be a relatively simple process, but I'm not quite sure how to approach it. I have a shapefile containing 1000's of polygons. I also have 19 rasters. All of the polygons fall ...
4
votes
3answers
143 views

How to get a list of distinct values from a shapefile field using QGIS?

I have a shapefile whose features I can filter by specifying a where clause in the query dialogue. F.x. I have a field named 'city_name' and by stating 'city_name = "London"' in the where clause only ...
2
votes
1answer
54 views

How to fix the “The inserted Ring is not contained in a feature”?

I am trying to add a ring in a feature in a shapefile. This feature is a single part feature but has already a few rings. When I try to add the new ring, I have the error message : "The inserted Ring ...
8
votes
1answer
395 views

How to convert GDB data to shapefiles without ArcGIS?

We've got some data (supposedly it's a simple collection of points--or at least that is all we need to extract) from a 3rd party in a GDB folder (I don't know how to tell what version) but we don't ...
0
votes
3answers
116 views

Where can I download public data set, especially shape file? [closed]

The places I know include: http://www.weogeo.com/ http://geocommons.com/ http://koordinates.com/ Any other suggestions?
0
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4answers
163 views

How can I clip a shapefile?

I have a SHP that includes the entire county and want to downsize it to a specific area...how??
1
vote
1answer
32 views

How can I convert an Integer field to a Real field in a shapefile?

How can I convert an Integer field to a Real field in a shapefile ? I'm searching a tool, or a way to do that (may be under QGis ?!). Regards
3
votes
1answer
76 views

shapefile batch clip and merge combined

I have two shapefiles, one is polyline, the other polygon. For each polygon I would like to clip the polyline vectors inside. Using arcpy I already found part of a possible solution: ...
1
vote
0answers
115 views

What is the best way to create polygons on a map and download files associated with the polygon?

My client wants to build a tourist site and for that he wants a backoffice for the map and the ability to draw polygons on the map (that user can see). When the user clicks on a polygon, he gets a ...
0
votes
0answers
49 views

Does anyone know of Electric Company Boundary Shape files that are out there for Free?

Ohio has a great website for their Electric Service Commission and I am looking for a shape file or data that would get me the service boundaries of electric companies for other states. EIA has data ...
2
votes
0answers
190 views

How to join data from a CSV to a shapefile using QGIS

I'm new to GIS and new to StackedExchange. I need help joining a CSV of Accessibility data to a LSOA shapefile in QGIS. The process explained here does not work for me and I don't know why. The ...
3
votes
1answer
784 views

Georeferencing a shapefile with ArcGIS 10.1

I have a shapefile with some polygons that I would like to superimpose to a raster image, but unfortunately they don't match perfectly due to the reference system the shp has been created with. So, I ...
3
votes
2answers
80 views

How to modify two polygons which have common point and line at the one time

I would like to modify two polygon at the one time because these two data has same point and line. Is it possible?? In the present circumstance, I have to modify polygon one by one. First, I ...
2
votes
1answer
86 views

Case sensitive query of shapefile in ArcMap 10

I am an IT guy, not a GIS guy. What I know about how to use ArcMap 10 I learned from Google. It has served me well so far. Apparently what I'm wanting to do worked in version 9, but no longer does in ...
2
votes
3answers
772 views

How to convert shape files (.shp) to Cad (.dwg ) format using Quantum Gis 1.7.0?

How to convert shape files to .dwg format using Quantum GIS 1.7.0 ? Thank you
1
vote
0answers
26 views

Decent Alabama GIS Clearinghouse?

Alabama's data portal (portal.gsa.state.al.us) is down and I haven't come across any other GIS clearinghouses for AL that are as good as say, Florida's FGDL. Does anyone know of a decent GIS ...
4
votes
1answer
151 views

Revealing the different layers of a shape file in QGIS

Shapefile I am referring to is 'NUTS_RG_03M_2010' which is together with several other Shapefiles available in a ZIP file on the Eurostat web site. the ZIP file the available map sets at Eurostat I ...
6
votes
1answer
180 views

Polygon creation (Clockwise rotation or not)

According to "ESRI Shapefile Technical Description An ESRI White Paper—July 1998", Vertices for a single, ringed polygon are, therefore,always in clockwise order. Otherwise,"Dirty" polygons occur when ...
2
votes
0answers
151 views

Open shape file in ArcGIS Runtime WPF SDK as Graphics/Feature layer

I googled and followed this tutorial http://www.arcgis.com/home/item.html?id=953a530ada30477d95cc69e788268bc9 and figured out how to import Shape files and Rasters into Runtime. However, it seems ...
1
vote
0answers
127 views

How to convert shapefile to mapinfo file preserving special characters?

I have to convert a bunch of shapefiles to mapinfo files on a machine without a MapInfo license, so I am using ogr2ogr to perform this task. The problem is that when opening the mapinfo files in ...
6
votes
1answer
161 views

Add polygons to existing shapefile in QGIS

I'm completely new to GIS and this is a very basic question about editing existing shapefiles. I am working off an existing shapefile which was digitized (by a colleague) so that polygons represent ...
4
votes
2answers
109 views

Creating space at intersection of two links

I have a shapefile consisting of two links which are crossing over each other. I want to create an empty space at the point of intersection of the two links. As of now, I have been manually doing ...
4
votes
3answers
84 views

How to subset X number of features from Shape file in QGIS

I'm looking for a means to take a rather large Shape file and split it out into separate, smaller shapefiles based on number of features. So for example, if I have a file with 1 million features, ...
7
votes
3answers
246 views

How to publish maps to web with no programming required?

I am new to GIS web development. I do not have any programming background and I want all the maps that I design in GIS (shapefiles, using ArcGIS 9.3) to be published on the web. Please tell me the ...
2
votes
0answers
153 views

How to Export a Shapefile as KML Using R

All, I have exported an ESRI shapefile (polygon) to KML using R, but the resulting layer shows only the outer extent of the polygon. How can I fill in the area with a color? Any help is greatly ...
16
votes
5answers
2k views

Bulk load multiple shapefiles into PostGIS

I've got over a hundred data layers in shapefile format that I want to upload into a PostGIS database. They are all in the same projection, but represent different data layers so they do not have the ...
2
votes
1answer
101 views

Annotation in ArcView 3.2

I've been asked to take a parcel layer (shapefile) that contains house numbers and create an annotation layer so the house numbers are displayed in a separate annotation layer rather than a label to ...
2
votes
1answer
120 views

How to fix encoding problems with Turkish characters? [duplicate]

Possible Duplicate: How to read Greek fonts (ISO-8859-7) in shapefile attributes within QGIS 1.8.0? My shapefile contains turkish (latin) letters. (see: ...
0
votes
0answers
81 views

Regional statistics from a dataset (point inside a polygon aka region)

I am relatively new to GIS and I am trying to do some geographical analysis on same data I've collected. The dataset I have consists essentially in a file with the following format: ...
2
votes
4answers
205 views

What are the advantages either way between GML and ShapeFiles?

After a good start many months ago of getting into GIS through QGIS, I had to drop what I was doing and did not touch it for quite some time. I am now able to get back into it and have a need to load ...
6
votes
2answers
121 views

How can I turn a vector layer into a graph G = (V, E)?

I have a number of rail networks, in the form of shapefiles of the "line" type. I want to turn them into a more abstract graph format, i.e. the kind with vertices and edges, not chart-type graphs. ...
7
votes
1answer
105 views

Reading shapefile tolerance in python

Is there a way to get the cluster or xytolerance from a shapefile into python using free/open source software? I'm currently using the pyshp package and can't see methods for this anywhere. Also it ...
4
votes
2answers
189 views

How do I Capture GDAL projection and create matching output (OGR or GDAL) shape files?

Working in C++, using GDAL and OGR: Depending on what the user has supplied for image input, I need to output point (or other) shape files in the same projection as the input raster images. The ...
3
votes
0answers
160 views

How to create Relationship Classes successfully

I'm new to ArcGis and I'm making the first steps at this time. At the moment I've two different shape files. The first shape file represents streets on a map with some detailed information in the ...
5
votes
2answers
197 views

How to generate discrete areas from multiple, overlapping features?

I have a point dataset that I want to append some information from a polygon to. My polygon shapefile contains over 500 features. Whilst each of these features represents individual areas they are ...
4
votes
0answers
104 views

How to get exact featureinfo in wms layer Geoserver [closed]

I got neighbor polygon feature info instated of clicked polygon feature info. In My Code: getfeaturenfo :function(e) { coordinates=e; var params = { ...
12
votes
3answers
192 views

How can I represent distance using the dashes or markers of a vector line?

I am a very basic user and dont know the lingo to get to the gist of my question so some background might help. Ive volunteered to create a pre-incident planning system for my rural fire department. ...
2
votes
3answers
242 views

Removing duplicate rows from a shapefile

I would like to write some c# code to delete duplicate rows from a shapefile stored in a folder. Can anyone provide me with an example or pointers on the best way to attempt this, please?
5
votes
1answer
254 views

Error when using pgsql2shp

I try to export geographical data from a postgis database to a shapefile with pgsql2shp. Normally this works fine, but now I receive the following error. Preparing table for user query... Done. ...
6
votes
3answers
129 views

Are there any open source Python modules compatible with arcpy that will allow complex SQL queries?

I am trying to handle string (non-geometry) duplicates in a large attribute table of a shapefile without having to convert to gdb and back or connect to a postgres db. I need to be able to use a count ...
3
votes
2answers
128 views

How can I keep the color of the shape file in arc constantly?

I am using arc gis 9.3 when I use a color for the shape file it changes everytime when I close and open the arc map so how I can constantly keep the color of the shape file that I work with
6
votes
1answer
344 views

How to connect places (points) without crossing lines?

I have two sets of data. One with placemarks represented by blue dots in image below, and another set of geographic data with lines represented by grey lines. 1) For the first point in drawing, I'm ...
4
votes
2answers
119 views

Easiest way to create measured intervals between shape points

I need to import a scanned photo of the outcrop (geology project) and re-create the grid from which i took plug data- each plug point will be drawn as a shape point file. The plugs were taken on a ...
2
votes
2answers
277 views

Merging Shapefiles With Geotools

I am trying to merge some shapefiles with different schemas in geotools. Im aware of ogr2ogr, but for now I would like to figure out this problem with Geotools. The steps I'm taking are: 1) Create a ...
3
votes
1answer
77 views

Points warped when exporting to shape

I have recently purchased a Trimble GeoXH (used) and have done a few surveys. I have done differential correction in Trimble Pathfinder Office and all points seem fine. When exporting to shape and ...

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