3
votes
4answers
11k views

Parse XML files in Python (ElementTree)

I am trying to parse some xml and rss feeds to extract some of their data in order to store it in a PostGIS database. The file I want to parse is here: http://earthquake.usgs.gov/earthquakes/catalogs/...
3
votes
1answer
5k views

How to convert lines to polygons using NetTopologySuite?

I am trying to convert lines to polygons using NetTopologySuite(a C# port of Java Topology Suite JTS). I ran the sample console code succesfully and it generated two polylines. I then tried to run ...
1
vote
1answer
466 views

Getting geotiff information into variables, not files, using gdal_translate, gdalinfo

I received an excellent answer to my question of how to get the lat/lon coordinates of the corners of a geotiff file. I used gdalinfo. The lat/lon info comes out into a file. Similarly I turned the ...
4
votes
3answers
5k views

Is there any tool/plugin for QGIS to easily select feature and edit attributes

I need to select polygons and change some attributes in a shapefile. I'm using Quantum GIS - I select the polygon, open attribute table and edit the attributes I want. I know there must be an easier ...
1
vote
2answers
484 views

How to restart an osm2po service from a previous run?

I have followed underdark's clear and concise "how to" to get osm2po running. The web service is a great little tool for inspecting the data. Is there a way to restart the service using an existing ...
6
votes
1answer
422 views

Performance Testing ArcMap?

I want to test performance of ArcGIS Desktop 10.0 based applications. I tried GDBT but it not give me any information about request time etc. I tried also a Workflow Profiler, but this tool usually ...
1
vote
0answers
196 views

ArcGIS 10.0 - How to have GP Service make rest calls instead of Silverlight client?

I have a Silverlight client that densifies a user drawn polyline. The returned vertices from the polyline are then sent to esri elevation sample server for each vertex to find an elevation value. ...
2
votes
1answer
623 views

Finding lat/lon of corners of geotiff file

I am a GIS newbie. I just recently managed to turn a GeoTIFF file into a bmp file using gdal_translate. Now I need to find the latitude/longitude coordinates of the corners. I would prefer to use ...
7
votes
2answers
2k views

How to Create Contours for Zonation

I'm still new in the world of GIS. I'm currently doing some zonation with "test points." Each has its own coordinates and "P" value. I want to make contours of these data, to divide the whole area ...
1
vote
0answers
113 views

List of GIS applications for Android OS [duplicate]

Possible Duplicate: GIS Apps for Android Tablets Do you know any GIS applications for android OS? I can recommend following ones: Locus - it is equivalent of GPS tourist navigation Shape ...
0
votes
0answers
96 views

How to change the projection of the base layer of a tile map?

Normally, we change projection of vector data for displaying it over a Google base map. Is it possible to change the projection of base image tiles map? If yes, how we can do that? Any reference or ...
0
votes
2answers
2k views

How to get address coordinates from OSM?

I've got an osm file containing the city I live in. Now I've got a tool to render and display it in the browser (mapnik+postgis+tilecache+openlayers+geoext) and the task is to make an address search. ...
2
votes
2answers
548 views

Convert HMR to GeoTiff

I've got gigs of .hmr raster files from our customer and I need them to be converted into GeoTiffs or something else which can be nicely imported into Geoserver system. I wonder if I can do it with ...
0
votes
1answer
757 views

Null output from field calculator code block

I have a simple calculation to compare two columns and populate a new column with the lower value but I am getting null output...any ideas? expression re_score(!Signal_Strength!,!Signal_Strength_1!,...
2
votes
1answer
739 views

get segments of constant length from Linestring MS SQL SERVER

For Example I have simple linestring 'LINESTRING(25 50, 100 125, 150 190)' and I need to divide it to segments of length 10. In postgis i know there is a function ST_Segmentize but what about MS SQL ...
1
vote
1answer
240 views

Not seeing the actual data value in getObservation response from MapServer 6

I'm experimenting with MapServer and SOS but I'm not getting back any useful data from the GetObservation call I'm doing. My .map file uses a Postgres query to get data and when I run that same query ...
1
vote
1answer
1k views

Arcgis 10.x Create equidistant polyline that are perpendicular to an axis

I have a polyline that represents a cyclone track and I want to create equidistant polyline that are perpendicular to the cyclone track. Many thanks for your help. Elie
4
votes
1answer
1k views

Union, Dissolve, Buffer — multiple layers, all in one step?

I'm a new user of Quantum GIS (1.7.3) and I need to repeat a task multiple times, so I'm wondering if there is a quicker way to do the following (with three or more polygon layers - each layer has a ...
3
votes
0answers
315 views

Cartographic Representations Load Rather Than Feature Symbology [closed]

We use ArcSDE to allow multiple users (both in my office and elsewhere) to access feature classes that my office maintains. We also use cartographic representations for many of our feature classes. ...
5
votes
1answer
550 views

Ogr2Ogr exported this boundary 90 degrees incorrectly

I've got some GEOGRAPHY data in my Sql Server 2008. I wish to export it as a shapefile (so I can import it into QGIS) and when I do, it's rotated 90 degrees to the left and then flipped 180 degrees to ...
1
vote
1answer
738 views

Aggregate Data between Polygons

I have data at the ZIP3 level and I need to join it to a state file. I also need the data within the zip3 file to be averaged, but for some reason when I use the join tools, i'm not getting the ...
3
votes
2answers
2k views

Error installing GDAL 1.9.0 python package

I'm trying to install the GDAL python package in a python 2.7.1 environment on RHEL 5. I am using the command 'pip install GDAL'. I have no problem installing other packages like numpy, etc. in this ...
2
votes
1answer
401 views

Querying OpenStreetMap tags by polygon using QGIS?

If I understand OpenStreetMap (OSM) correctly, all objects essentially have associated tags based on type of object (street, building etc) ... Can I use QGIS to obtain the statistics of different ...
0
votes
1answer
232 views

identifying single overlaping features from a GeoServer layer

I'm trying to use GeoServer to display features from a PostGis table the url will look similar to this. Example URL Localhost:8080/geoserver/cite/wms?service=WMS&version=1.1.0&request=GetMap&...
0
votes
3answers
610 views

JSAPI 2.8 and Dojotoolkit 1.7.2? May?

I realize no one can give a definitive answer but is it reasonable to think the next release of ESRI JSAPI will be built on top of dojotookit 1.7? And will be released in the next 2-3 months? Any ...
28
votes
9answers
4k views

How to easily shift all features in a vector dataset?

Let's say that I put together a Shapefile and all the features have their vertices shifted by a constant amount. What's the easiest way of shifting all the features (hence the (x,y) position of their ...
3
votes
1answer
3k views

How to install osm2pgrouting on Windows?

I've only done networking using ArcGIS, but am now trying to set up with OpenSource software in a Windows environment. I have PostGIS installed and found a Windows binary for pgRouting (although I'm ...
4
votes
2answers
3k views

Is there an easier way to edit polygons in ArcMap?

I am updating woodlot polygons in ArcMap 10. Instead of editing individual verticies, is there a way to edit that is more like drawing part of a new shape (say if the woodlot has expanded only on one ...
1
vote
2answers
5k views

How to initialize a WFS Layer?

Here is the code block (the layers are stored in Oracle database): var saveStrategy = new OpenLayers.Strategy.Save(); var adresspt_wfs = new OpenLayers.Layer.Vector("Address points WFS", ...
9
votes
1answer
451 views

Efficient raster sampling of billions of polygons (bounding boxes)

How can a raster be computed efficiently (in Python), given a set consisting of billions of bounding boxes (read sequentially from a file), and given that the raster values for each cell should give ...
2
votes
1answer
1k views

What does “Error when writing Schema: A unique destination featuretype name could not be generated for” mean?

I have a bunch of GML datasets which I need to import to Esri featureclasses. I am using the Data Interoperability extension for ArcGIS, which should support this. However when trying to import my ...
3
votes
1answer
506 views

making choropleth maps using PostGIS Windows

i read an article on chicago tribune blog about making maps, it consist on "making choropleth maps using PostGIS, TileMill, Mapnik and Google Maps" on Mac environnement, my question is how we can ...
0
votes
1answer
131 views

Parsing entire ArcSDE database searching for field for export? [closed]

I'm wanting to parse through an entire ArcSDE database (feature dataset, features classes, tables, everything...) searching for a field (compkey) and export the numbers to a txt file.
4
votes
2answers
296 views

What program(s) can I use to edit a boundary?

So i've got some shapefiles imported into my Sql Server 2008 Database. A number of these boundaries need to get 'cleaned up'. As such I need to do the following :- Export them from Sql Server 2008. ...
-2
votes
1answer
164 views

How to get Polygon Co-ordinates which is at angle X? [closed]

Let say I have a line, which co-ordinates are (0,0) and (5,0) which is straight. Now I move the line to 45 degree. What will be co-ordinates now? Similar, I have to do this for triangle, polygon. I ...
0
votes
1answer
1k views

MapServer WMS not configured properly?

This is related to another question I asked just recently: Use OpenLayers WMSGetFeatureInfo on Mapserver Layer? unicoletti indicated that he/she was able to use OpenLayer's WMS Layer declaration to ...
6
votes
4answers
5k views

How to scrape data from a google map (in flash)?

I've contacted the author of this NYC homicide map from the NY Times several times to see if he could send me a spreadsheet of information the data is based off of, but I have not had any response (...
2
votes
2answers
205 views

Color a layer of the map based on the location of dots on another layer

Thanks for helping me in GIS 101 Problem #2, now I have followup questions: I created a map as below: The map is created using the following script: ct <- readShapeSpatial("...
5
votes
3answers
1k views

Is there software that will do reverse geocoding to convert photographs' GPS locations to addresses?

I am using a standalone GPS tracker that produces GPX files and then clock-sync photos with it using Microsoft Pro Photo Tools. This works pretty well. But I was also using a feature of Pro Photo ...
1
vote
2answers
790 views

Field calculatur in ArcMap 10: How to specify field row?

I'm new to arcmap, so I'm not entirely sure about terminology which is probably why I can't seem to find the answer to this seemingly trivial question. In the attribute table I want to be able to ...
4
votes
1answer
661 views

Which interpolation method is the most suitable for DEMs?

Which interpolation method is the best suitable for hill/valley areas and normal ground with undulations and rivers? When working with Aster 30mX30m DEMs, which method will give the most realistic ...
1
vote
1answer
576 views

Merging OD Cost Distance Matrix result from ArcGIS Network Analyst in ArcPy?

Using ArcGIS 10 Network Analyst, I've created small python script that calculates OD matrix between certain locations, i.e. not between each origin and destination but for each origin I have a set of ...
1
vote
1answer
396 views

Where are WMX connection files (JTC) stored?

I know that JTC files are SDE connection files with the extension changed from 'sde' to 'jtc'. They are not stored in the folder with the normal sde connection files. Where do they get stored?
2
votes
1answer
2k views

convert .cdr to shp file in ArcEditor 10.0

i am looking to convert a .cdr (Corel) to a shp file. I am using ArcEditor 10.0 (I'm brand new to using 10.0 after using 9.3 and brand new to ArcEditor after using ArcView). I have never had to ...
4
votes
1answer
6k views

How to plot points on maps using ggplot2 and R?

Thanks for help me in GIS 101 Problem #1, now I have geocoded a few hospital in Connecticut using google map, I have able to visualize them in QGIS, now I am trying to do it in R. ct <- ...
15
votes
2answers
1k views

Which world map projection allows comparing countries by shape and size?

The Mercator projection increases scale along with the latitude. Greenland seems larger than Australia, when in fact it is much smaller. The equal-area projections however stretch shapes away from the ...
2
votes
1answer
299 views

Why is GRASS not thinning a terraflow raster properly?

I want to convert a raster map encoding directional flows (the output of r.terraflow) to a vector map. I'm using r.thin to process the output. It terminates successfully with 0 pixels removed during ...
3
votes
1answer
442 views

Looking for Mid-Holocene (~6000 BP) bioclim dataset

I am trying to obtain climate data for the Mid-Holocene (~6000 BP), preferably in the bioclim (19 bioclimatic variables) raster format. The worldclim.org website lists this dataset based on the CCSM ...
0
votes
1answer
512 views

Generate a random 100x100 m bounding box in any projection in pure Python?

I'm given: Extend of WMS Layer SRS Now I want to, in standard 2.6 Python (no OGR or C lib dependencies), to generate a 100x100m random bounding box within that extent (assuming it is more than ...
3
votes
2answers
6k views

Use OpenLayers WMSGetFeatureInfo on Mapserver Layer?

I'm able to use OpenLayers' OpenLayers.Layer.Mapserver declaration to generate a raster from GRIB data. I've read in the MapServer docs and on forums that it should be possible to get point ...

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