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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6
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3answers
775 views

How to convert factfinder2.census.gov map data to KML?

I've downloaded a map from http://factfinder2.census.gov/faces/tableservices/jsf/pages/productview.xhtml?pid=DEC_10_SF1_P1 (limited to San Francisco census tracts), and I'd like to convert it to KML ...
1
vote
4answers
278 views

How to work with NREL data in QGIS?

I would like to use QGIS to display solar data from NREL. The file is supposed to provide solar radiation data of Colorado. However, I have some trouble to select this data in QGIS: In QGIS, I select ...
6
votes
1answer
2k views

Spatial distance join between polygon and points using R?

I'm figuring out how to do a Intersection (Spatial Join) between point and polygons from shapefiles. My idea is to get the closest points and those points that match completely inside the polygons. In ...
3
votes
1answer
974 views

C# Library for converting Shapefile Projection

Is there any C# library which can take a shapefile as an input with projection information defined (e.g, EPSG 3011) and return a new shapefile with user specified projection (e.g, EPSG 4326) ?
4
votes
5answers
2k views

How to add a projection to a Shapefile using open-source tools?

I have been given some shapefiles WITHOUT a projection. So I need to add the projection in order to display it on google map. I found the projection information I need at ...
7
votes
3answers
3k views

How to delete multiple selected polygons at once?

I'm new at this, a novice at best. I'm using QGIS 1.7.3. I simply want to select a large number of polygons on screen and hit the delete key to delete them and resave the shapefile. Can this be done?
4
votes
2answers
6k views

How to change projection and show latitude / longitude in QGIS?

I am new to QGIS and pretty ignorant with the subject, but I want to be able to see the latitude / longitude of a point (with a mouse click) in Quantum GIS. I imported a shapefile (roads of finland ...
1
vote
1answer
2k views

How to generate shape file from Excel or CSV files? [duplicate]

Possible Duplicate: How can I convert an excel file with x, y columns to a shapefile? Probably this could be an easy question for most of the people. But I would like to know the way to ...
2
votes
1answer
771 views

Shapefiles on WMS Server

I've been reading about using WMS servers to server shapefiles. When a server does support shapefiles over WMS, what format does the client download the shapes in? Will it typically be an image format ...
0
votes
1answer
502 views

Choosing best projection/SRID

I created a shape in OpenJump and exported it to shape(ESRI) file and then imported it to SQL2008 via shape2sql , the problem is that it shows bigger than what I want, In OpenJump it shows 1meter ...
2
votes
1answer
404 views

ArcMap v10 - Polygon Layer - Keeping one polygon above another

I have a shapefile with polygons of differing colors. I am using a white hash pattern to represent partial ownership. In short - Polygon #1 is Green and Polygon #2 is a White Hash pattern. ...
10
votes
5answers
562 views

Database versus Files for Solo Developer

I'm just getting started in GIS and am interested in using it to create maps of mountain biking trails in my area and nearby. I've been learning QGIS and have made enough progress to generate a decent ...
4
votes
2answers
841 views

How to cut a shape file?

I want to use a shape file of the Corine Land Cover. This covers all of Europe, but I am only interested in the area of Scandinavia. How can I cut this file using free software (preferably a ...
9
votes
1answer
2k views

Instantiating spatial polygon without using a shape file in R

So, the usual way we read a shapefile in R is via the maptools package, like this: sfdata <- readShapeSpatial("/path/to/my/shapefile.shp", proj4string=CRS("+proj=longlat")) However, I have a use ...
0
votes
2answers
2k views

How to import data from excel and associate it with individual shapes?

New user on ArcMap - Working with shapefiles... Question: the shapefile I am working on, a polygon is a plot of land, each plot of land has a history of owners. I am currently having to copy/paste ...
4
votes
2answers
588 views

Extract all pixels of given RGB value and render as MultiPolygons

Given a geotiff image with a colortable in it, what is the easiest way to extract each color as its own "layer or shapefile or multipolygon object"? Specifically, I am looking for a programmatic ...
1
vote
1answer
664 views

Overlapping map tiles with mapnik's generate_tiles.py script

I'm trying to generate map tiles using the mapnik's generate_tiles.py script, but the resulting tiles are overlapped. Example The tiles have the following directory structure: ...
9
votes
3answers
780 views

Alternatives to Shapefiles as open-source, cross platform dataset types

I am working on software that is very ESRI oriented, but a future version will likely not be using ESRI software. It uses Shapefiles and Geodatabases. I'm planning on getting all of my data to ...
3
votes
2answers
963 views

Simplify Shapefile

I have a shapefile that contains neighborhood boundaries that I want to simplify. Right now I am thinking of converting the shapefile to Google maps KML so I can insert the boundaries into the map as ...
4
votes
2answers
317 views

How to register shapefiles to an image?

I'm generating images from various sources and the projections are not necessarily known ahead of time. The images are subject to interpolation and other alterations while being rendered, but I can ...
2
votes
1answer
168 views

Using ArcPy to fetch Information from a .GDB

I am new to GIS and I would appreciate if you could guide me a little. I have a .gdb folder with data and I need to process that data to find educational institutions which are within say X Km of the ...
7
votes
1answer
4k views

Converting a polygon into a raster using R

I'm trying to convert a shapefile into a raster within R. My approach is to read in the raster as follows: library(rgdal) # Loads SP package by default demo <- readOGR('F:/data/', 'shapefile') # ...
3
votes
1answer
3k views

How do you add file name to an attribute field?

Does anybody know how to add the shape file name to a field in the file's attribute table? I've found a description: 'You have to use inline variable in CalculateField like %Name% in expresssion ...
1
vote
0answers
85 views

List of methods of determining the projection of a shapefile when .prj is missing [duplicate]

Possible Duplicate: Best practices for identifying the unknown coordinate system of a Shapefile It would be helpful to mention what information is needed to perform each technique. What are ...
6
votes
1answer
711 views

projection/pyproj puzzle, and understanding SRS format

I have a shapefile that has a .prj file, with the following wkt contents: ...
3
votes
2answers
685 views

Where can I download all 3,141 County US Polygons clipped with high resolution shoreline data?

After having done quite a bit of research I have been unable to find a single shapefile download which includes all of the current 3,141 counties with their associating data clipped with the highest ...
0
votes
1answer
69 views

Error running geotools tutorial for CSV2SHP?

Although I run this tutorial I always get following error message: Nov 22, 2011 5:10:50 PM org.geotools.referencing.factory.epsg.ThreadedPostgreSQLEpsgFactory isAvailable WARNING: ...
2
votes
4answers
465 views

Where can I find a shapefile of zoning for the city of Phoenix and other municipalities?

Where can I find a shapefile of zoning for the city of Phoenix and other municipalities? I would rather not have to geo-reference a picture and digitize over it, there must be some data already out ...
6
votes
1answer
1k views

Get shape filename in attribute field using field calculator

I apologize for crossposting against the ESRI geoprocessing forum, but it seems like this one gets answers. I'd like to have a modified append tool (ArcToolbox) that takes multiple shapefiles with ...
9
votes
3answers
7k views

How to create a shapefile in ArcGIS 10 using arcpy?

How can I create a shapefile using Python in ArcGIS 10? I have lat & long. From this I need Python code which will create a shapefile and display it in ArcGIS 10. Thanks.
4
votes
2answers
212 views

Append Point Shapefile Location by GPS'd text file

In my industry it is common to create preliminary design maps for point locations that have a unique identifier. Upon the actual construction on the design, points change location based on ...
4
votes
2answers
2k views

usa electric transmission powerlines shape files sources

Does anyone have a good source for these? I have some old (1993) data from the US National Renewable Energy Laboratory (NREL) and Cubewerx' WMS (Cubewerx are a spatial data provider); neither of which ...
1
vote
0answers
455 views

QGIS Layer Properties Field Tab

When I setup my layer properties I selected some of the attributes to be hidden on the Fields tab. I would like to change the EDIT WIDGET from hidden to a different function however some of them are ...
4
votes
2answers
6k views

Using ArcMap, how may I convert a shapefile to use decimal degrees?

I have a shapefile that currently uses meters as the measure for its coordinate system, but the map framework I wish to use expects decimal degrees. I'd like to reproject my shapefile to use decimal ...
3
votes
2answers
3k views

Import Shapefile to Postgres

I am trying to import a shapefile to Postgres using the following: shp2pgsql c:\location\water_areas.shp water > water.sql I am receiving the following message: c:\location\water_areas.shp: ...
2
votes
1answer
721 views

Seeking shapefiles of business locations

Does anyone know where to find shapefiles of businesses such as grocery stores or gas stations? Thanks!!
14
votes
6answers
1k views

Creating simple image from vector data

Can anyone suggest a quick (and preferably open source) way to create an image from a shapefile. For example, I have a shapefile containing parcel boundaries, I want to create a png file depicting ...
13
votes
4answers
1k views

Python module to delete SHP features (without Desktop GIS installed)

I have a piece of software (not Arc) that runs nightly on a non-production machine which updates shapefile features from an external database. Periodically I would like to delete all of the features ...
4
votes
1answer
3k views

How to add field in attribute table by python

I have research on the question (How to add an attribute field to an existing Shapefile via Python) but could not implement it. If you can give me examples on how to add field name in attribute ...
2
votes
2answers
640 views

How to set right coordinate system?

I have shapefile (points) which I got from adding xy data in ArcMap from Excel table. I had Latitude/Longitude data. It is area of northern Australia. For example (5 points): Longitude 136.882 ...
7
votes
1answer
2k views

How to convert Shapefile geometries to WKB using OGR?

I got the geometry of a feature of the shapefile, and i want to save that geometry in the postgis (in WKB formats like it happens when we import shapefiles using shp2pgsql and psql commands). How do I ...
2
votes
1answer
343 views

Error while importing shapefile using shp2pgsql: Coordinate values are out of range

I have a shapefile with 180 points. I'm using shp2pgsql-gui via pgAdminIII. This is an error it gives me when I try to import shapefile. Failed in pgui_exec(): ERROR: Coordinate values are out of ...
6
votes
3answers
2k views

Create Shapefile with auto increment primary key in QGIS

Is there a way to create an auto increment primary key column when creating a new Shapefile in QGIS?
3
votes
3answers
478 views

How can I import only a subset of the polygons in a Shapefile using QGIS?

I have a shapefile that is covering a huge area, with lots of polygons. The area I'm insteresting in is small and limited. Is there any way to only import (using "add vector layer") the polygons from ...
5
votes
1answer
620 views

How to convert a line Shapefile into a CSV with nodes and links?

Is there a way to convert a linear shape file into a csv file of the following format: Node_1, Node_2, attribute_1, ...., attribute_x 1 2 "hello" 567845.334 I have looked at ...
7
votes
3answers
637 views

How to script shapefile editing with open source tools?

I would really like not to disturb anybody and find my answer by a Google search, but I don't really know where to start. I have a .shp vector layer with several points on streets, each having a list ...
2
votes
0answers
117 views

How to fix Graphserver warning “osmdb has no edges!”?

I'm really new to GIS. I have some shapefiles data that I'm trying to import in graphserver. I'm doing: gs_osmdb_compile output3.osm output3.osmdb And the result is: WARNING: osmdb has no edges!. ...
10
votes
2answers
1k views

Which Windows GIS editors support the creation of 3D shapefiles besides ArcGIS with 3D Analyst?

I need to find and easy and affordable way to generate 3D linear shapefiles in Windows so one of our users can inspect our tool. We incorrectly assumed that he had 3D shapefile source data available ...
2
votes
1answer
344 views

Why does this python function return a value of 0 in field calculator?

I am trying to calculate the percentage of a total which the median value makes. I have a column with the median column labelled (i.e. 1st,2nd,3rd,4th column is median), the columns of values and the ...
0
votes
1answer
293 views

Why does collapse dualline to centreline only create an outline of the dataset?

I'm trying to collapse all divided roads in one centreline and to integrate any other spurs or errors in the dataset to create one set of centrelines. I have used Merge Divided Roads but it leaves a ...