1
vote
1answer
12 views

How to generate pgrouting source and target with OSM?

Is there anyone here can explain me more details for pgrouting's source and target? I'm wondering how to generate with the given lonlat in OSM PostGIS entities. In pgrouting's website, they are ...
0
votes
0answers
2 views

Central Feature Tool Key Error u'M'

I was trying to execute two tools (Mean Center Tool and Central Feature) when suddenly it gave me a error that I couldn't find the resolution too no matter what I tryed. The code is here (along with a ...
0
votes
0answers
8 views

Batch create maps using arcpy.mapping

I'm trying to create .mxd and PDF outputs for a series of feature classes in an SDE. I'll need to match 2 feature classes (one original, one buffered) in the SDE based on similar file names. The ...
0
votes
0answers
4 views

kriging interpolation of many z

I have similar questions with Iterating through z-values in ModelBuilder. I want to interpolate my z's with my specific interpolation extent raster and extract each value to specific grid points (I ...
0
votes
0answers
12 views

Determine changes in land cover of isolated features over time?

I have a a study area of 2 Landsat scenes from 2013 which were classified for a specific natural community, and these areas have been isolated and extracted and digitized into vectors so that they can ...
0
votes
0answers
35 views

Python script to export .csv tables from GDB

I am very new to Python programming and have been tasked with writing a program to export a csv file from a file geodatabase feature class. The csv should contain only certain fields and the records ...
0
votes
3answers
28 views

Model Builder is not intersecting erased and selected files

I'm having trouble debugging my model that I'm creating in ArcMap 10.1 ModelBuilder. The model is just a simple string of geoprocesses, but there's a point at which the model isn't exporting the ...
1
vote
0answers
14 views

r.stream.* commands do not work in qgis environment

I have been working for a while with some grass commands in QGIS environment (r.watershed, r.terraflow, r.thin, r.to.vect etc) with out any problem. I haven't been able to get any results at all from ...
0
votes
2answers
188 views

Create multi-line from point in PostGIS

I'm working on an old table where polygons are stored as points. Now, I want to migrate these points to PostGIS and store them as polygons (or multi-polygons). The table structure is as follows: ...
0
votes
0answers
4 views

ogr2ogr “Error: pointer being freed was not allocated” on mac mavericks

I've successfully installed GDAL via homebrew on mac But while I'm using command ogr2ogr, keep getting error below $ ogr2ogr -f geoJSON tl_2010_20_tract10.json tl_2010_20_tract10.shp ...
0
votes
1answer
10 views

Gdal_grid gives blank .tiff file after conversion

After using gdal_grid I get blank .tiff file. I use the following .vrt file : <OGRVRTDataSource> <OGRVRTLayer name="p"> <SrcDataSource>p.csv</SrcDataSource> ...
2
votes
2answers
63 views

Recommended opensource solution for storing, publishing and querying GIS data

Our company has millions of feature classes currently stored through ArcSDE on SQL Server 2008 R2. We are kind of slowly making our way to opensource software. What we want to achieve is to be able ...
0
votes
0answers
17 views

QGIS 1.8.0 ask me to install scipy

I need help in a step by step to install scipy via QGIS or via python, I'm not familiar with python language so the guide of Nathan's blog wasn't useful to me due that OSGeo4W don't recognize the ...
0
votes
1answer
9 views

Apply new style to selected features in QGis

Let's assume that I have selected some features in QGis. Now all the features in that vector layer already has some style applied to it. Now, I want to apply some new style to the selected features. ...
4
votes
2answers
441 views

Are there open source solutions for travel demand modelling?

I'm looking for open source tools for travel demand modelling (eg The four-step UTMS). Preferably in a GIS environment. That works well with Qgis, Grass and Postgis. My question is not related to ...
1
vote
1answer
24 views

Python Geospatial development book error?

I am currently reading Python Geospatial Development by Erik Westra but I am stuck at the first hurdle where the book suggests that the easiest way to install gdal onto a windows machine is using ...
0
votes
1answer
31 views

Feature table: Mapnik, GeoServer, CKAN, GeoNode, GeoNetwork?

I'm trying to get a clear view of the roles of different components here, this is not a "which is better" comparison, these components have different roles, but their functions overlap. (Comparison ...
1
vote
1answer
35 views

one-to-many join using arcpy

I have a feature class that contains polygon features with a unique ID column. This shape-file is to be joined with a csv table that I've exported to a file geodatabase table. The unique identifier in ...
0
votes
1answer
19 views

how to use gdal_rasterize? how to know which attribute to burn with ogrinfo?

I have a vector layer I need to rasterize. I guess this is a basic operation, but I haven't found the information I need yet. First, I have reprojected the vector shapefile: ogr2ogr -s_srs ...
1
vote
2answers
287 views

Transforming a google maps overlay to fit a Ordnance Survey projection

I am currently in the process of creating a map with some administrative boundaries on it. The base map I am using is an ordnance survey map 1:10000. I downloaded an administrative border as a .kml ...
3
votes
1answer
19 views

Data Driven Pages - Page Number with Count

I hope this isn't a duplicate question, I have had a look but couldn't find an answer. I have a set of 100 data driven pages showing different roads. I would like to export the map book by road. ...
0
votes
3answers
248 views

Geoserver 2.4.1 ImageMosaic Plugin Error Creating Store

I am creating a store with GeoTiffs using the Image Mosaic Plugin and I get the following error when pressing the button Could not list layers for this store, an error occurred retrieving them: ...
1
vote
1answer
11 views

QGis: Selecting more than one feature using values

What should I do if I want to select more than one feature using values ? For selecting a single feature, I enter an expression like this which works: "LINK" = 28 Assume LINK as a field in the ...
2
votes
0answers
20 views

How to get the two nearest points between two polygons

I'm trying to draw the nearest line between the nearest polygons in a Polygon dataset (ESRI Shapefile). I know that for this purpose there is the Near Tool (ArcGIS), but it just return the point TO ...
1
vote
1answer
28 views

Some items have coordinates switched when loading PostGIS layers in QGIS

I am having problem with strange coordinates switching when loading PostGIS layers in QGIS. First, I thought, that problem may be cause by the use of GROUP_BY feature in layer query, but later the ...
0
votes
1answer
45 views

Data driven page with Count

I was wondering if there is a way to add coding to Data Driven Pages with python. I would like to be able to take the "Data Driven Page with Count" and increment the count by one or in some cases ...
2
votes
2answers
103 views

Arc Hydro 2.0 for use with ArcGIS 10.1 (or later) for Desktop?

I have ArcGIS 10.1 for Desktop and the toolbox of Arc Hydro 1.1 beta. I want to find and donwload the Arc Hydro 2.0 for use with ArcGIS 10.1 for Desktop but, after research on the net, I cannot find ...
0
votes
0answers
38 views

Is it possible to build a relational database system in arcgis desktop? [on hold]

I know that we can create table joins and relates and geodatabase relationships, but can ArcGIS for Desktop be used as a relational database system for 1:m and m:m relationship models? I have been ...
1
vote
0answers
17 views

Change default raster style of newly created rasters in QGIS

If I do calculations on rasters with the raster calculator or other tools, the resulting rasters displayed in my canvas are always in the same default style (singleband gray, black to white...) so ...
1
vote
2answers
306 views

Polygon intersection with bounding box with polygon's holes intact

I am trying to serve GeoJSON FeatureCollection tiles with each feature's geometries trimmed to the tile boundary. I am working on a Leaflet plugin to re-assemble the geometries. It works by building ...
2
votes
0answers
20 views

Can I save an ArcGIS GeoPDF with all layers turned off, which can then be turned on individually in a pdf viewer?

I am working on an mxd that has many individual point layers (displaying species locations). To make life easy for my stakeholders, I'd like to export to a GeoPdf so that all of these point layers are ...
1
vote
1answer
25 views

Export “Zonal Statistics As Table” output in Modelbuilder

I have an extremely simple model that takes as input a shapefile for zones along with a value raster. All the model does is produce a table of my desired zonal statistic for each zone (the mean). ...
1
vote
1answer
12 views

How to export postgis points as blocks in dxf with ogr2ogr

I'm trying to export postgis points as blocks to DXF format. I have a simple table in postgis with columns: CREATE TABLE pod_com_azimuth ( ogc_fid integer, rotation double precision, pointtype ...
1
vote
0answers
16 views

geotiff conversion to coordinate system with gdal

I would like to get the coordinates X Y Z from a geotiff file. I am using the gdal translate for the conversion. Which output format is the more adequate for containing a 3 numpay array X Y Z ?
1
vote
2answers
38 views

Is there raster equivalent to vector Intersect?

The intersect tool that is used on vector data cannot be used on raster data. What tool can I use for my two rasters that does the same as the Overlay > Intersect tool?
1
vote
0answers
36 views

Preventing Python AddIn with esriEditor.StartEditingCommand opening Editor toolbar?

I'm developing a toolbar with some geoprocessing routines and digitizing functionality using arcpy (ArcGIS 10.1 and 10.2.2). On this toolbar I have implemented a start edit button, which uses the ...
0
votes
1answer
26 views

Editing KML breaks icons

Edit: Solved it. When I was creating my new zip/kmz my code was creating various folders within the zip/kmz. Changed: NewZip.write(addedfile) to: NewZip.write(addedfile, newfl) /Edit I have KMZs ...
0
votes
0answers
12 views

How to increase the resolution of a 3D image in QGIS GRASS NVIZ

I'm trying to display 3D data in NVIZ within QGIS, but the result appears very low resolution in comparison to the same data in ArcScene. Any ideas as to how to improve the quality would be greatly ...
2
votes
4answers
126 views

raster area calculation using python script

Hi I am a beginner to python programming in GIS and am trying to calculate the area of a raster. When I ran the program, I got error message below. I am also providing my code. Any help would be ...
0
votes
0answers
16 views

How to convert data type from float to integer in QGIS?

Currently I am working on importing data from MSSQL to Qgis 2.4. In imported database table attributes are shown in the format of integer ( in attribute table it showing like 48.23 and 16.20 in ...
0
votes
0answers
14 views

Converting the x-axis into a river line [on hold]

How does one create a simple bar graph which shows abundances on the y-axis and sites on the x-axis; but where the y-axis is on the right and the x-axis is a river line? (see image for examples)
1
vote
1answer
12 views

How to convert ASCII in x,y,z format using gdal_grid?

I have a map saved in (AFAIK) Arc/Info ASCII format and I would like to convert it with gdal grid but I am getting errors. My data (p.csv) is in the following format: 319053.25,319301.12,544.28 ...
4
votes
1answer
3k views

How to do a simple find and replace in QGIS field calculator?

I'm trying to replace selected string values in an attribute table, eg. "Text1" for "Text2" (QGIS 1.8.0), patriculary for those rows with NULL values. I have been trying to use the replace expression ...
1
vote
0answers
288 views

WMS Query does not return all records (Geoserver)

This is a tricky one - so bear with me... i'm a Geoserver newbie... Basically, i have two very similar queries that return species records for a given species in a given geograpic area. One query ...
2
votes
2answers
98 views

Invert gdaldem aspect

I am trying to identify lakes and other water bodies in a DEM file. The source file is located here. I am using gdaldem aspect to identify contiguous pixels with zero slope change. gdaldem aspect ...
0
votes
0answers
10 views

How do i add online GeoServer layers on android mobile app [duplicate]

I am trying to develop an android app, and in this app I want to display a Google map and on this map I also want to add some layers on the Map which I have created from GeoServer. Basically my ...
1
vote
3answers
46 views

Ontario Topographic and Property Data

Looking for Ontario topographic data and property line data; willing to purchase the latter. Shapefiles or file geodatabase files would be optimal. In terms of topographic data, I am looking for: ...
2
votes
2answers
586 views

How to convert raster to point in QGIS

I wanted to convert Raster into Point Vector in QGIS. Is it possible? QGIS have option to convert it into polygon but i didn't found any tool to convert it into point. can anyone help me?
1
vote
1answer
83 views

Connect a sub-model with multiple outputs to current model

I have a model in model builder that is clipping multiple feature classes to my study area. It is running with an iterator and creating 4 new clipped feature classes that are only represented by one ...
1
vote
1answer
14 views

Converting Landsat8 DN to TOA reflectance for use in envi

I am used to working in envi, however my current version does not support Landsat8. I downloaded GRASS for the express purpose of converting Landsat8 DN to TOA reflectance for use/analysis in envi. ...

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