1
vote
0answers
56 views

How do I use the SPOT land cover data?

This is a follow-up to my previous question: Where can I find recent rainforest (change) land cover data? I have succeeded in finding data that more or less meet my needs but I cannot interpret ...
5
votes
0answers
41 views

how do you sort points so that they are geographically near each other [duplicate]

Possible Duplicate: One dimensional map of the world? I am trying to create a google map. I am creating placemarkers using an external script in a kml file. I'd like to sort the markers ...
2
votes
1answer
167 views

erratic behavior in google maps kml

I have created a kml file with around 300 place markers. When I try to display the kml by typing the address in the maps search bar, the map seems to behave erratically: - If I click on the marker ...
3
votes
2answers
577 views

How to export a raster into ascii without nodata values?

I need to export a grd raster file into ascii .xyz without nodata values. This is not a problem in itself...I´m using Saga-GIS export grid to xyz module.(ArcGIS 10.01 produces a very strange table of ...
2
votes
1answer
207 views

Why is pgrouting astar not consistent?

I route from 1 end of a circular route to the opposite end. Visually it is obvious that going clockwise is shorter, however shortest_path_astar sometimes picks clockwise and sometimes anti-clockwise. ...
2
votes
0answers
633 views

How to open image file saved with JAI in Geotools?

I need to find NDVI and other vegetation indices and then find changes in time with tif images. I've been using Geotools for this. I took 2 tiff images, then using QGIS I changed them to PNG because ...
11
votes
3answers
411 views

How to improve drawn shapes in Quantum-GIS?

I have a polygon-shape in qgis-1.7.0 and want to fix overlays and gaps between the edges of adjacent polygons. See image below. Is there any automated way to do this in quantum-gis? Or any other ...
7
votes
2answers
1k views

How to get distance between one point and all other points in a table?

I have a table in Postgres with lat and long columns. Can I use the ST_Distance_Sphere or ST_Distance_Spheroid methods to get the distance between one point and all other points in the table? Do I ...
7
votes
3answers
5k views

How do I get the area of a WGS84 polygon in square meters?

The following gives me the area of the polygon in square degrees: SELECT ST_Area(ST_GeomFromText('POLYGON((871325.790874952 6105405.3261047,871418.748307692 6105359.72944624,871346.22022442 ...
2
votes
1answer
280 views

Which OpenLayers.Protocol should I prefer which design patterns provided at?

At our scenario, there is a server which stores the feature info (coordinates, properties, etc) into a SQL database. Google Maps are used for a layer. The geoJSON data format are used for ...
2
votes
1answer
581 views

How to move a Point perpendicular from nearest Line?

I want to move Point perpendicular from nearest line or polygon, and the question is how to do that? example, I have points (house number) near roadbed, and I don't want them to intersect roadbed ...
9
votes
2answers
7k views

In OpenLayers zoom to extent of all overlays

In Openlayers I can zoom to the bounding box of all layers like this: map.zoomToExtent(); I can also zoom to the bounding box of a single layer: map.zoomToExtent(layer_name.getDataExtent()); Is ...
5
votes
1answer
1k views

Vector Building Footprint Resources - Tokyo

I typically know where to look for this data in the United States, but I'm at a loss when looking for building footprint shapefiles abroad. I thought I could find what I was looking for with Open ...
3
votes
1answer
344 views

How do I draw multiple copies of a rectangle in QGIS?

I am trying to create a map of our parish cemetery. I almost have a file with the centre point of each headstone plotted and now want to add a rectangle to each point to lay out the grave positions of ...
3
votes
1answer
360 views

Where can I find recent rainforest (change) land cover data?

I want to try to get a handle on what's becoming of the world's rainforests right now but not seeming to find recent (i.e. around 2010) data. The stuff here: http://www.glcf.umd.edu/data/ as far as ...
3
votes
1answer
960 views

GeoDjango Changing My Coordinates

I'm running into a problem when saving a coordinate into one of my models in (Geo)Django. My point field is setup as: location = PointField(blank=True, null = True) So while running some tests in ...
1
vote
1answer
914 views

How to set up an OSM routing server

I would like to set up an OSM routing server on my LAMP stack. I am interested in doing a lot of of routing queries. I have a search function that is closely related to getting the driving distance ...
3
votes
0answers
2k views

How to set margin on PageLayout in ArcGIS Engine?

When we create a PageLayout from the A4 Landscape template and print the layout on a pinter with A4 Landscape paper we get four pages instead of one. We are using the IPage.PageToPrinterMapping = ...
0
votes
1answer
351 views

ArcGIS Server Java Edition - Deploy App to Embedded Tomcat

I am more experienced with the .NET side of the house, so please excuse me if this is a simple question. Can I deploy an non-ArcGIS/ESRI app to the embedded Tomcat instance shipped with ArcGIS Server ...
2
votes
1answer
344 views

How to programatically replace ArcGIS Online image with new imagery in mxd's?

I have many mxds that previously used ArcGIS Online Bing imagery. I want to replace those with newly purchased imagery. I know I need to use the arcpy.mapping.MapDocument module to do this though not ...
5
votes
1answer
2k views

clipper transformer FME

I have a fairly extensive workspace which among other things has an output of shapefiles in several needed projections. I have those going to the respective folders for use in different business ...
1
vote
2answers
595 views

SAGA-GIS Produces different results in command line than GUI

I have been working on a lidar processing workflow using SAGA-GIS. I determined my workflow on a single tile in the SAGA GUI and now I need to batch the operations on 100 more tiles. I wrote a batch ...
0
votes
2answers
351 views

How to install GDAL/OGR with GRASS vector support?

The GRASS 6.4.3Svn for Windows that i have in my machine does not have GDAL/OGR support. Is there any library (libgrass) for Windows to add into existing GRASS installation. If not, how to build or ...
0
votes
2answers
2k views

Server Object instance creation failed on machine

Our GIS Server setup includes 1SOM and 2SOC servers. I am getting this error in Server log. I have tried several settings but none seem to fix the issue, looking for some feedback on what is the ...
9
votes
2answers
2k views

Nearest point on a line ( Spherical / Mercator projection )

I have a line (Ax,Ay - Bx,By) over a mercator projection (google maps) and a random point (Cx,Cy) nearest to that line, i would to know the closest point (transparent blue on the image) over that line ...
8
votes
5answers
435 views

Another Student in Need of Career Advice

I would like to apologize in advance for asking yet another "what should I do with my life" type of question. I am currently a senior who is very close to finishing up my B.S. in Information Systems. ...
2
votes
2answers
2k views

Howto change OpenLayers BBOX request projection?

My map uses EPSG:900913 projection on the map. All coördinates in the database are stored in the 'normal' google format / GPS coordinates (WGS84). For instance, if you save a new location..Before I ...
1
vote
1answer
1k views

How to use OL Script protocol callback

I have a layer with a BBOX strategy with a script protocol to get the data from our server. I'd like make use of the callback function ...
1
vote
1answer
333 views

No route results after calling network analyst service

I have published a network analyst service and I'm trying to use it from the Flex API 3.1. When I use the service in ArcMap or through the rest GUI in a browser, the service returns the right answer. ...
17
votes
1answer
199 views

Can we create views over a raster table in Postgis2.0?

Is it possible to create PostgreSQL views over a table that contains raster data? I have succeeded in creating the view but the entry in raster_columns is not correct (all the raster info is ...
0
votes
2answers
4k views

slow import via osm2pgsql to postgresql database

I try to import berlin.osm (33Mb) into the postgres database 9.1 via osm2pgsql. My desktop is mem 2Gb,proc 2Ghz,hdd 60Gb, RHEL6u2x64. This process is so slowly in particular when I'm going over ...
11
votes
1answer
14k views

How to enable “snapping” in Quantum-GIS while drawing polygons?

I tried to draw polygons in qgis-1.7.0 and I somehow can't find or failed to find the "snapping" option. I'm used to ArcGIS-10.0 where you have some snapping options, like placing points of polygons ...
1
vote
2answers
470 views

Priority labelling in geoserver

Good day can i ask something about geoserver 2.2.1? I have my maps then i want to see the largest cities before the small cities but i don't have population instead i have my PLACE column its not a ...
2
votes
1answer
347 views

Wrong coordinates after resizing the map

I catch a click event on openlayers map and show a popup with featureinfo (if any) with position set as map.getLonLatFromPixel(new OpenLayers.Pixel(e.xy)). The user might set the map to show in ...
0
votes
1answer
283 views

Terrasolid - How to define spherical mercator (EPSG: 3857)

Im trying to define the srs EPSG 3857 inside Terrasolid sofware. I ran into a problem because the definition of the reference ellipsoid is given with a major axis and inverse flatening, not via both ...
3
votes
1answer
187 views

Show feature classes as a checklist in a workspace in ModelBuilder

In my model, I would like to show all the feature classes inside a file gdb as a "checklist", similar to how the tool dialog window for Make Query Table looks: So instead of the input being a ...
2
votes
0answers
520 views

Android Apps to edit WFS-T

Are there any mobile Android Apps where you can edit the Features served via a WFS-T?
0
votes
1answer
1k views

In leaflet does the addControl automatically handle events via the leaflet API?

I need to add additional overlay layers to be controlled by the controls within the leaflet map boundaries, but the code utilizes a leaflet-custom.js file. I am assuming it handles the event and ...
5
votes
1answer
4k views

How do I average a set of rasters?

How do I average a set of rasters? I have remotely sensed chlorophyll a rasters for several days and I need to get an average of the days represented as one raster layer. I've got QGIS 18.0 with the ...
8
votes
3answers
14k views

Where can I download the Google Road network as shapefile?

Is there any site from where I can get Google Road network as shapefile? As per my knowledge It is not distributed by google. So anybody can suggest how can I create this road network for a custom ...
2
votes
0answers
234 views

Centroid of the equator and a point

Suppose I already have a way to compute the centroids of different geometry types: Points (arithmetic mean of Cartesian coordinates). Linestrings (polylines) (weighted mean of segment mid-points in ...
4
votes
0answers
2k views

problem with saving to esri file

I was using Wroclaw 1.7/GDAL 1.9(earlier release)/Grass 6.4/GSL 1.15-2 and started getting the following message when saving any item to esri format. "Export to vector file failed. Error: creation of ...
5
votes
1answer
4k views

Is there a way to export QGIS layers to KML?

has had anyone had any luck with the new experimental plugin qgis2kml? I keep getting the error msg layer : format not yet supported I had a look but the author has not provided any documentation, ...
1
vote
0answers
129 views

What solution is there to project google/bing layers to another EPSG (e.g. 3844)?

I am using Geoserver and Openlayers. The Openlayers map has all the layers in EPSG:3844. I need to overlay Google/Bing layers. I am currently trying to do it with proj4js, mapproxy.org as openlayers ...
7
votes
2answers
600 views

How do different GIS systems determine a Polygon's interior?

I'm interested in understanding how real-world GIS systems and their data encode Polygons. Specifically, how do they resolve the ambiguity of a Polygon's interior on a sphere? Background: in 2D, ...
7
votes
1answer
424 views

How do I represent the whole Earth as a Polygon?

This is related to determining the interior of a Polygon. My difficulty is that if I specify a Polygon covering the Earth going from East to West, it will still have a boundary along the ...
4
votes
1answer
189 views

Map automation, create and populate inset maps for densely-labelled areas

I would like to know if it is possible to automate the example in the picture below, unlike the picture below i'm using vector data. I would like for a fixed scale generate map, but when labels are ...
6
votes
1answer
3k views

Setting up an application in QT Creator that uses QGIS API

I am a 15 year veteran of Java making my first entry in to C++ applications. I have a specific need to develop a desktop application that produces graphics type output as well as displaying imbedded ...
9
votes
3answers
3k views

Chart inside pop up window in Javascript

How to show a chart inside pop up window? I'm using Leaflet JS, which has support for raphael plugin http://dynmeth.github.com/RaphaelLayer/. Is it possible to create a div inside popup window? I was ...
9
votes
5answers
5k views

Better Distance Measurements in Web Mercator Projection

I am working with an ESRI stack, storing my layers in a sql-spatial-enabled-SDE- geodatabase (Geometry type, Web Mercator-3857). I am building a web mapping application, so by default, the tiles are ...

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