0
votes
0answers
14 views

geoprocessing service keeps running with default value for choice list, instead of actual value selected

I have published a script tool to a geoprocessing service. The tool is supposed to take user input from a choice list (which contains values from a field), and then that is loaded into select by ...
0
votes
1answer
93 views

Override or add to [GeoExt.ux PrintPreview] rotation

I'm using suite-sdk (GXP) to build my WMS client. I want add to PrintPreview window capability of changing rotation. I find this feature in Heron script but there is other version of [GeoExt.ux ...
0
votes
0answers
7 views

AGS Tiled Map Services and the .jpg file extension using js api

I have an old app that is still using esri js api 1.4 (i know, it's dated) but that app works and it can pull tiles from a 10.0 tiled map services. When it does that it calls for the tiles at the url ...
4
votes
2answers
453 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 ...
0
votes
0answers
25 views

ArcGIS ModelBuilder Clip Raster by Polygon Error

My task is to derive the hypsometric integral and hypsometric curve for a lot of drainage basins. Since it is very time consuming to do this manually, i have created a model (with help from this ...
4
votes
1answer
102 views

Calculating a Unique ID on a Subgroup of Polygons

I would like to assign a unique ID to polygons in a dataset. The catch to my issue is that I would like polygons that fall within a polygon to have the same unique ID. My example is related to ...
2
votes
2answers
73 views
+50

How to get extent out of GeoTiff

How do I get the extent out of the GeoTiff format? I want something like this: Extent(293518.1886150768,5680494.194041155,890338.5054657329,6267530.571271311) AKA the xmin, xmax, ymin, ymax ...
1
vote
1answer
45 views

How to compute a line intersection point in a street layer in postgis 1.4?

I have a street layer downloaded from osm. I need to calculated intersection point as we do in qgis from vector menu -> Analysis tool -> Line intersections. I am new to postgis/postgres. any how i ...
1
vote
1answer
39 views

How to write a (memory) layer from QGIS to PostGIS?

I am looking for an "elegant" solution to write, from a python script, a layer from qgis and into a new table of a PostGIS database. I thougth that this might be solved by QgsWriteVectorLayer, but I ...
1
vote
1answer
84 views

What is the best way to display point data (with standard deviation) using QGIS/SAGA/Manifold? [on hold]

I would like to display point data values (indicating biomass at a point) but also to show the standard deviation value for each point. What would be the best method to do this in QGIS (I'm a basic ...
1
vote
0answers
21 views

How to add a TIF raster layer programmatically?

This is my code whenever i try to load .tif image it shows layer is not valid,QgsRasterLayer always return invalid layer (I am using linux 12.04). QString myFileName = ...
1
vote
0answers
21 views

Is it possible to change the 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
1answer
16 views

How to select 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
2answers
81 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 ...
4
votes
4answers
550 views

How to optimise and speed up Python code?

Again my lines of surface runoff... I made a script, solving the issue when lines cross other lines. Something like generalization. Like on the picture below. The problem is that I have to solve 30 ...
0
votes
0answers
7 views

GeoJson layers with leaflet in IE8

I have built a website displaying a lot of line shapes, using geojson, on a leaflet map. This is working relatively well in most browsers, though speed could be improved. As usual IE8 is being the ...
0
votes
0answers
21 views

Understanding X Y coordinates: geocode before or after projecting? What determines how many decimal places?

I am trying to figure out how different my groups' past Network Analyst analyses have been because they were using a geographic instead of projected coordinate system. But I'm getting hung up on the X ...
0
votes
1answer
80 views

select (click) labels in openlayers

I have the following style for an OpenLayers vector layer. Color and Name come from Geoserver/PostGIS. I red that setting labelSelect to true, user can also click the label, not only the point and ...
0
votes
1answer
7 views

QGIS Filters and Querries [duplicate]

In QGIS is there a way to filter a layer using the Query Builder to show all values which include a particular phrase. For example I have a list of organisations and I want to filter all those which ...
0
votes
2answers
84 views

How can I delete dangling paths after merging features

In my previous question I've asked how to can I merge different polygons while converting to GeoJSON and TopoJSON. After a day of researching I've realized that, rather trying to do it command line, ...
0
votes
0answers
11 views

Hex grid value interpolation in POSTGIS

I have a table of tessellated hexagons that I created as a hex binning grid to cover an area. I've then overlaid a point set to give some of the hexagons a value, see diagram:- The shapes with ...
0
votes
1answer
29 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 ...
1
vote
0answers
10 views

request entity too large importing replica schema changes

setup: Main server: SDE 10.2 SQL Server on our own network. Parent replica and tools run from here. Destination server: Amazon web server running ArcGIS Server & SDE 10.2 SQL Server. Child replica ...
4
votes
1answer
246 views

How do I install Orfeo toolbox and Qgis 1.9?

I'm having a lot of trouble getting Orfeo toolbox and Qgis 2.0 working. I followed the qgis wiki instructios, added the ppa, installed qgis 1.9 (it's beautiful, great work!). But when i tried to ...
0
votes
0answers
8 views

How do I export only additions when running export-diff to a shapefile in geogit (geogig)?

I currently have two commits in my GeoGit (GeoGig) repository. I'm running the following command on the two commits to get the differences exported to a shapefile. geogit shp export-diff [commit1] ...
0
votes
0answers
26 views

Lat Long to Useable values in QGIS

I am using both QGIS 1.8 and 2.0. So either is helpful. A client has given me locations of trial pits but i cannot load them into QGIS no matter how hard i try. For example, 50°24.711 North ...
0
votes
0answers
14 views

Get Result of ICalculator without actually populating a field (ArcObjects)

I have two feature classes: FeatureClassA and FeatureClassB. I am running a cursor on FeatureClassA and I have some logic statements (spatial and attribute logic) that compares the current feature in ...
1
vote
0answers
16 views

What C/C++ libraries exist to transform vectors between map projections

Has anybody written a C/C++ library (preferably one that is aware of Proj.4 definition strings) that has a set of routines to convert vector quantities (e.g., wind speed and direction) between map ...
1
vote
1answer
16 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
13 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
3answers
36 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
11 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> ...
0
votes
0answers
19 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
16 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. ...
1
vote
1answer
38 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
41 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
23 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 ...
0
votes
3answers
252 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
29 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
47 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
105 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 ...
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
23 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
28 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 ...

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