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.

learn more… | top users | synonyms (1)

4
votes
2answers
2k views

Check if shapefiles exists in folder

In ArcGIS modelbuilder I want to check if a shapefiles exists, if not I want to create the shapefile in that folder. I guess the calculate value tool within ArcGIS modelbuilder can be used, but I need ...
0
votes
0answers
69 views

GIS web development [duplicate]

Possible Duplicate: Steps to Start Web Mapping I want to create a Web GIS using an open source software.Also the software should be capable of importing shape files and kml.I have good ...
4
votes
1answer
624 views

Calculation of average point distances from one another within a polygon grid

I am working with processed LiDAR data of forested areas in ArcMap 10, with various area based statistics extracted for each 30x30m polygon grid-cell in a shapefile. There are approximately 20,000 of ...
1
vote
0answers
325 views

ogr2ogr failed to reproject shapefile error exceeds limits

I cannot get correct transformation from WGS84 to the Hungarian EOV EPSG:23700 (Hungarian Datum 72) using ogr2ogr. I am using ogr2ogr from the fwtools shell. I have a shapefile in GCS WGS84 (epsg ...
0
votes
0answers
40 views

Historic country borders in GIS format? [duplicate]

Possible Duplicate: Is there a source for historical shapefiles and tiles? Does anyone know of a good source for historic country borders, in a GIS file format, like shapefiles? I've been ...
1
vote
2answers
162 views

How to select only areas bigger than x acres?

I would like to create a new shapefile from another area shapefile. The new shapefile should only contain all areas that are bigger than 5 acres (10.000 m²). How do I do this?
2
votes
5answers
4k views

How to export labels to DXF file?

Is it possible to export labels based on Shapefile attributes into a DXF file? I use Quantum gis in Version 1.7.4. I've been reading a CSV file and view it as a Shape Layer. With the help of ...
4
votes
9answers
11k views

Creating shape file from file with coordinates

How can I make a shape file of an csv file with coordinates?
2
votes
3answers
1k views

Openlayers: Copy shape layer in a vector layer

I have a web-gis application based on openlayers and geoserver. I need to modify a shape layer. I'm able to show the shape using the OpenLayers.Layer.WMS method. In fact i published the shape in ...
2
votes
1answer
313 views

Can anyone point me to a dataset (shapefile or other format) for the North American Continental Divide?

I'm looking for a more detailed dataset than the 1:2,000,000 shapefile available from the National Atlas, preferably one suitable for use at 1:24,000.
3
votes
1answer
1k views

How to prepare or normalize raw shape (.shp) files for Openlayers use

Hi all it seems like I am having difficulties in normalizing raw map files' resolutions to openlayer's use most probably in parameters mapext and imgext. I hope you can help me with this. Using raw ...
0
votes
3answers
452 views

How can I query and categorize a shapefile using MS Access?

Is there a way to categorize locations by lat-long in MS Access using caparisons to shapefiles?
2
votes
1answer
687 views

Why does aggregate polygons consistently error out?

I'm using aggregate polygons on a dataset with three large study areas. It did not work. So I split it into separate areas and did it again. Two of the three areas (which were smaller than the third) ...
1
vote
0answers
45 views

How to load GeoJSON files directly onto QGIS? [duplicate]

Possible Duplicate: Plugin or script to get QGIS to display geoJSON in a layer Is there a way to do this? Or is there a way i can put it onto PostGIS and then load it onto QGIS? I actually ...
1
vote
3answers
267 views

Visually Merging ZIP polygons and Extracting by boundary from SQL Server 2008

i have a lot of shapefiles. For simplicity, lets say all the zipcodes of the USA. I've imported them into SQL SERVER 2008. I wish to merge lots of the shapes into one shape. I'm sorta struggling to ...
2
votes
0answers
128 views

Geotools throws “Cannot encode multilinestring (yet)” while Shape import on Linux

I've encountered a strange platform-dependent SHP import problem. Everything works fine on Windows, shape files are converted fine to database. There is although small little warning: [[ACTIVE] ...
2
votes
1answer
426 views

coordinates in dbf file wrong

I am new to ArcGis, so please bare with me :D . I converted a polygon in an mdx file I have to a shape file, then converted its vertices to points, then used "add X Y feature" and choosed coordinates ...
5
votes
3answers
2k views

FME: Join attributes in text file with attributes in SHAPE file

I have a SHAPE file with points and different attributes - one attribute MyID. I also have a plain text file with several attributes - each in a separated column: MyID MyValue 1 A 2 B 3 C ...
5
votes
2answers
471 views

Display of zoomable image thumbnails instead of symbols on maps

sincere congratulations on your ingenous QGIS and the many extremely useful extensions. In my research on African archaeology I work a lot with geotagged pictures (drawings; photos; plates etc.) which ...
5
votes
2answers
1k views

Shapefiles for U.S. Area Codes (NANP)

I have a bunch of telephone numbers (just the area codes), and I'd like to geolocate them and make a map, but I haven't had too much luck googling for shapefiles for Area Codes. Surely these are in ...
2
votes
1answer
1k views

FME: No attributes exported when writing to SHAPE file

Setup: I have some input data (SHAPE) which I use a Clipper transformer on. Depending on the result of the Clipper, I assign a value to an attribute. In the end I assign the two results/streams to a ...
5
votes
2answers
897 views

Loading data onto PostGIS using KML files with attibute data

So, I have a kml file which contains 317 data points (317 polygons and the respective 317 names). The kml file also contains attribute data which pops up in a bubble on Google earth with about 12 ...
3
votes
2answers
955 views

Convert KML to shapefile without losing attribute data

So I want to convert KML files to SHP shapefiles to load it onto PostGIS. Currently I'm using ogr2ogr to do the conversion for me, but it wipes out all the attribute data. How do i preserve this ...
5
votes
1answer
843 views

SQL Query to Reverse Geocoding in PostGIS

I try to do Reverse Geocode from my shapefile on the database. I'd already try with Spatialite and PostGIS to put shapefile (.shp) into it. But I'm still can't delivered my objection about reverse ...
2
votes
2answers
2k views

How to correct a wrong projection of shapefile?

i have a shape file wit UTM zone 16. This projection is wrong. It must be UTM zone 32. How can i correct the projection? When i convert (f-tool) to UTM zone 32, all the vector are rotated. The ...
2
votes
1answer
329 views

How to add Real Attributes to Shapefile using pyqgis?

I created the Qmarxan plugin using the fTools plugin as an example base. When I create a new shapefile using the QgsVectorFileWriter function I don't have any difficulty specifying a "Real" field with ...
0
votes
1answer
12k views

Import shapefile in CAD

I'm trying to import shapefiles into a DWG using diferent layers names and during my web search I found this post. I know you did this 2 years ago but my problem is very similar and I wonder if you ...
9
votes
2answers
2k views

How to split non-contiguous feature in QGIS?

I have a shapefile with a feature that is non-contiguous. I want to split the areas on the left from the area on the right. However, QGIS's Split Features tool requires you to draw a line over the ...
1
vote
2answers
219 views

How to fill “shapefile name” and “name of attribute”?

When I try to create a shapefile two of the boxes to fill in are "name of the attribute" and " shapefile name". this may be very basic but I can't find and answer. I want to fill them in correctly. ...
21
votes
2answers
23k views

How to calculate polygon areas in QGIS?

Hi I would like to simply calculate areas of a area-shape file in square meters or in acres (ha). I didn't find that functionality in the vector tools. Could anyone here help me with that?
3
votes
1answer
400 views

Sum up area left “underneath” polygons in QGIS?

I have an area shape layer and multiple other area shape layers. Now I would like to calculate how much space (square kilometers or percentage of area) of the polygons of this area layer is NOT ...
-2
votes
1answer
240 views

I have a shapefile containing three types of polylines, how can I color each type with different colors? [closed]

I have a shapefile containing three types of polylines, how can I color each type with different colors ?
1
vote
3answers
1k views

Android GIS - Reverse Geocode using Shapefile (.shp)

I want to develop an Android application. I'm still a newbie here. What I want is to develop my app just like a GIS that can implement reverse geocoding. So I can put in lat / lon coordinates and ...
0
votes
1answer
434 views

shapefile and multiple lines of census data QGIS [duplicate]

Possible Duplicate: How to join multiple records to single feature? I am hoping to be able to link in the attribute table more than one line of data from a census entry per polygon. for ...
2
votes
3answers
637 views

Where can I find the highest resolution shapefiles for counties or states

I am looking for a download source which has the highest resolution (greatest detail/accuracy) for all counties in the US. More specifically I run into this problem mainly when dealing with the ...
3
votes
1answer
441 views

Is there a commandline tool for intersecting Shapefiles?

in QGIS vectorlayers can be intersected. That is apparently done by ftools and seems to be integrated into the QGIS-program itself. That is different from many other functions that call GDAL-tools. ...
5
votes
2answers
1k views

How to draw a point at an exact location with spplot?

I imported a Shapefile holding a quite detailed world map from: http://www.diva-gis.org library(sp) library(rgdal) world = readOGR('./countries_shp/', 'countries') Using R with the sp-Packages, ...
2
votes
1answer
151 views

How to digitize from a map with additional detail views?

I have a map with a river that includes islands within it. Some islands have a blown up version (detail views) outside of the river showing land ownership details. I would like to make polygons ...
4
votes
1answer
2k views

How to display places names when using Quantum GIS and shapefiles?

I am new to the world of geo systems. What I would like to do is displaying some information on a map for given regions. I downloaded shape files from cloud made web site and load layers using ...
2
votes
0answers
82 views

Determine which points fall within a 3D polygon and export this subset to a flat file

I am working in ArcMap 10 and will have a 3D representation of a zone of transmission. I would like to determine which GPS points fall within this polygon and then export this subset out to a flat ...
1
vote
1answer
465 views

How to create one shapefile from multiple rasters?

Ok, I have about ten maps that connect along their edges to each other linking rivers and properties. When I link them all in Inkscape I end up with a large file that won't save (and a smaller one ...
1
vote
1answer
323 views

Looking for help identifying projections and reprojecting

Hi there at the new forum, I'm still struggling with projections in qgis. The "Vogelschutzgebiete" reprojection worked. But these ones seem to be tougher: ...
3
votes
0answers
455 views

How to export multiple Shapefiles to one KML file in QGIS?

As the title says, is it possible to export multiple Shapefiles to one single KML in Quantum GIS (Similar to "Map to KML" in ArcMAP)?
2
votes
2answers
919 views

Is there a browser/management view in QGIS?

Is there a browser/management view in QGIS 1.8 so that I can manipulate shapefiles and others (such as geo tiffs, etc.) like in ArcCatalog? Maybe a plugin? Right now I have to use my system's file ...
5
votes
2answers
551 views

Translating all features in a shape file

I have a friend with a bit of a problem. He has 1000+ shape files mapping paddocks and being used for precision agriculture. He's recently discovered the base station positions used to create these ...
0
votes
1answer
265 views

What is the correct projection to use with tm_wgs84_sans_antarctica.shp?

I am using tm_wgs84_sans_antarctica.shp with mapnik to generate tiles. I am using the tiles with Google Maps Javascript API V3. But the projection is way off. Here is roughly what my code looks like: ...
1
vote
2answers
594 views

Storing Polygons in PostGIS (data coming from shape files)

We want to store data from shape files in PostGIS all in one table. There will be two columns in the table: boundary - The polygon data (How do we store this?) mongo_id - Links to a mongo database ...
0
votes
1answer
479 views

ArcGIS: Extracting data from large intersect dataset

I have a big dataset imported into ArcMap. For each point, I created a buffers of 200m. And I apply Intersect to all the buffers, resulting in a huge dataset of around 2183962 objects. Previously, I ...
2
votes
3answers
1k views

Rendering a shapefile with a custom projection in GeoTools

I have an image, a shapefile, and a method which can translate an x/y pixel location from the image into a latitude/longitude point or vice versa. I'm trying to use Geotools to render the shapefile on ...
4
votes
1answer
2k views

Sea routes network dataset

I am now working on a system to perform routing on a network of shipping lanes. See this dataset that I have as the base: http://geocommons.com/maps/109850 I have postgres and pgrouting up and running ...