0
votes
0answers
16 views

Editing many-to-many relationship classes with Javascript API

I am seeking some guidance on best practices when working with many-to-many relationship classes thru the ArcGIS Server Javascript API. I am designing a traffic count data management application. ...
1
vote
2answers
39 views

PostGIS to GeoJSON with GDAL: how to get lat/longs?

I'm trying to convert line features from PostGIS to GeoJSON files, as follows: from psycopg2 import * from subprocess import call conn = connect(dbname='gis') cur=conn.cursor() cur.execute("SELECT ...
0
votes
1answer
10 views

How to calculate area in km2 Qgis 2.0 [duplicate]

I have a simple question. I have calculated the area of the polygons in my shapefile, but the number seems confusing for me. I need the area to be shown in km2 but instead I get numbers like:0.004008 ...
0
votes
1answer
30 views

Export data from .mxd file to ms sql database

I am using ArcGIS product (v.10.1). I have also tempalte of Maps from ArcGIS. But i need to get data from maps (.mxd files) to store it into MS SQL database. Explanation: I have application that has ...
0
votes
2answers
19 views

register to event in openlayers 3

I have a web application in openlayers and I am starting to rewrite it to openlayers 3. In the application i have some features that i need to delete/move/add/edit the features then to save it to the ...
1
vote
1answer
16 views

bounding box in osm files

I have a osm file,i convert it to pbf file by osmosis.but it not convert to .map file.i use this in cmd: osmosis --rb file=city.osm.pbf -mw file=map.map bbox=34.3635451292,30.0247495993,57.513131979 ...
1
vote
1answer
41 views

How to calculate the head drop along the river automatically in ArcGIS?

I am calculating the hydropower potential of a large river basin. I have already had the hydrological modeling of the large (53000 km2) river basin and also I have DEM of the basin and river network. ...
0
votes
0answers
13 views

Create Simple points in Sharpmap [on hold]

im using sharpmap v 1.1 to create a desktop application in VB.net i m loading a raster(geotiff) file with WGS84 system a subroutine gets the coordinates of a mouse click which i want to be converted ...
0
votes
1answer
38 views

How to identify in googlemaps with below data [duplicate]

How to draw polygon in google maps with below point data?It should be plot in India Andhrapadesh startpoint endpoint startpoin xpos , Ypos endpoint xpos,ypos _0 _2 713.955, ...
0
votes
0answers
4 views

CartoDB get rows in initialized map

Is possible to get the data in this example? I mean something like: map = cartodb.createVis ... map.data.each ... ? Or, where in documentation can I find something about it? or, which keyword ...
1
vote
0answers
65 views

LIDAR Dataset displaying 500,000 meters to the East of correct position

First post on here.. I've been hung up for a couple days. Why does my LIDAR dataset show up ~500,000meters to the east of the correct position even though a spatial reference/coordinate system is ...
1
vote
1answer
48 views

How to find nearby objects using Easting and Northing range

I have a bunch of objects which have associated Eastings and Northings in format OSGB36 for example: 265397 869562 547297 179002 If I have a starting Easting and Northing, and wanted to find ...
1
vote
2answers
15 views

Create a common scale for different raster layers in GRASS, SAGA or QGIS

I have a number of layers that represent the temperature variability of the water in a lake. They have been generated trough interpolation and have different values as they represent temperatures ...
0
votes
1answer
12 views

How do I show the created_at column at my infowindow?

Fields like created_at, updated_at or cartodb_id are a greyed out thus not allowing us to add it to the info window. Is there a way to extract the data from default fields in cartodb?
0
votes
1answer
24 views

Globe on my Qgis doesn't work.

OS : osx 10.9.2 * I just operated a clean osx installation. Globe have never worked since I started to learn QGIS. When I tried globe, it terminated QGIS then a message(see below) occurred. Any ...
2
votes
1answer
24 views

Extra detailed bounding polygon from many geometric points

I have a database of around 100,000 postcodes each with lat/lon which I have converted to geom type in PostGIS. Each postcode also has one of 5 "regions". I wish to generate an accurate bounding ...
0
votes
1answer
36 views

change spatial resolution

I have two types of image, one of them is a TRMM image with 0.25 degree cells and the other one is a MODIS image with 1 km spatial resolution. How can I change my TRMM image resolution to 1 km ...
2
votes
1answer
52 views

Problem installing QGIS Valmeira on Windows 7 Professional 64-bit

I have been having trouble installing QGIS Valmeira on Windows 7 Professional with SP1. When I installed to the default directory C:\Program Files\QGIS Valmiera\, many of the predefined coordinate ...
2
votes
1answer
36 views

Re-project raster image from Mercator to Equirectangular

I have a raster image of the world map in Mercator projection, square 1:1 format. I want transform the image into an Equirectangular projection accurately. I assumed from my research that GDAL would ...
3
votes
1answer
29 views

How can I add 3 axis orientation information to my photos?

I have a survey project where I need to record not only the location, but the direction (bearing and angle of elevation/depression) that the camera was pointing at the time the picture was taken. ...
2
votes
0answers
50 views

Large loads geojson from mysql to leaflet?

I have a mysql database with +25K rows including geometry and other attributes. Using a mysql2geojson php script I then added it to a leaflet map. It is super slow now, what can I do to boost the ...
1
vote
1answer
17 views

Parameter values to create a vector grid with 1km x 1km cells?

I created a shapefile from WKT in QGIS using the values from this link. I want to create a vector grid with 1kmx1km cells but I can't figure out what values need to be set for the X and Y parameters. ...
1
vote
2answers
45 views

How to close polylines that mark shape of cirque glaciers?

I have mapped a lot of cirque glaciers, using polylines to mark the shape of them. Now I need to Close these polylines, but I do not know how to do that. I have tried converting them to polygons ...
1
vote
1answer
28 views

In what ways has QGIS 2.x API changed making Plugin Builder Tutorial invalid?

I am working on the QGIS workshop Tutorial for QGIS Plugin Builder and notice that it is for QGIS 1.1. As this seems like a popular tutorial, in general, what are some areas of this tutorial that need ...
1
vote
0answers
29 views
+50

Postgresql JDBC Table Valued Parameters

MSSQL has a great feature called Table Valued Parameters. It allows you to pass a table of a custom data to stored procedures and functions. I was wondering what is the equivalent , if exists, in ...
0
votes
0answers
8 views

how to add layer style in geoserver using gxp_styler by GXP api

I am using GXP api(open Geo Suit) for my GIS application.I want to add style to layer using gxp_styler plugins.This plugin is working fine for me but the problem is that when i add a new style to ...
2
votes
1answer
24 views

How can I extract only band 4 from a geotiff multi bands to create geotiff or AAIgrid with this band using Python?

I have a geotiff file with many bands... I will like to create a .asc file or tiff file by converting only one band from the geotiff file. I don't find the solution by using python... With ...
0
votes
1answer
24 views

Does OpenLayers3 support WKT format?

How can i show spatial data(Point, LineString,Polygon) on bing map using openlayer3?
1
vote
1answer
16 views

CartoDB SQL string as integer

Because data is imported as string, I need to query string values as if they were integers, is there something I could use to cast values to string? Where could I find documentation for this SQL in ...
0
votes
0answers
6 views

CartoDB SQL API to Layer

How to use SQL API output to create a layer in a map? I thought it could be achieved with createLayer passing the data directly, i.e. not with URL as second argument, but the data I am getting from ...
0
votes
1answer
41 views

ogr2ogr : Converting KML to GeoJson

I have a requirement convert .HML file to GeoJSON or JSON. Can you please recommend open source command line tools on GNU/Linux(2.6.32-358.14.1.el6.x86_64)? I have installed gdal, I am getting beloow ...
0
votes
1answer
29 views

migration of irregular polygons to grids/blocks

How do you convert irregular polygons to grids (blocks) of regular/square shapes. I am trying to convert irregular shaped mining concessions to regular blocks in ArcGIS Am using arcgis 10, arcinfo I ...
0
votes
0answers
26 views

export shapefile to spatialite hangs qgis

I have a shapefile layer containing 9 points. The attribute table has a string column (max 18 chars) and a real column. The .dbf file is ~4KB, all the other files are 1KB. I right-click on the layer, ...
1
vote
2answers
42 views

How to find all features in one table that intersect features in another table in PostGIS?

I have two tables, boundary polygon table and location point table. I need to find all boundary polygons that contain at least 1 location point. What is the proper way to do this in PostGIS? I tried: ...
0
votes
0answers
20 views

Add existing QGIS plugin button to custom toolbar

Is it possible to add an existing plugin's button to a custom toolbar? I've succeeded in adding core actions such as shown below, but am wondering if it would be possible to integrate another plugin ...
0
votes
1answer
37 views

Identifying streets of same name where split by osm

I have a large map of every street in the country. This is a vector layer in QGIS many streets are split by OSM , IE have a different OSM ID yet the street has the same name. Often these streets are ...
0
votes
1answer
55 views

How to add a simple interface to mapserver CGI application?

I have a simple mapserver test page which shows information from shapefiles (cities, rivers, lakes, points of interest) etc. The result is a static PNG image. I want to add a simple interface so users ...
0
votes
0answers
16 views

openlayers setCenter issue (other posts on this do not solve it)

I can't get map.setCenter to display an OSM layer (via openlayers) centered at my specified coordinates. Instead it defaults to the West Coast of Africa. The zoom level does however work. Both of ...
1
vote
1answer
16 views

Is there a way to edit the host name of Postgis layer?

Recently I change my server to a remote host. That's means all my work there I used Postgis layers, the host name at the source is set to 'localhost' and I need to change to 'remotehostname'. The ...
1
vote
0answers
24 views

How do I split a DEM at a certain elevation?

I have a DEM that includes bathymetry and terrain elevation and I would like to split it at the coastline. Ideally, I would end up with one tif that's land and one tif that's bathymetry. I have ...
0
votes
0answers
13 views

kmz file does not display on google earth [closed]

Is there any reason why a kmz file wouldn't show on google earth. The shapefile from which it is created It looks fine in ArcGIS.
0
votes
2answers
49 views

Find maximum and minimum value of points within a polygon buffer?

I have a series of 500m buffer zones along a polyline. I also have a series of points following the line, each point represents a 10m x 10m cell. I calculated the values of a field in each point known ...
0
votes
0answers
29 views

Have I created a valid Spatialite database?

I didn't manage to find the better way to populate the exisiting Spatialite database with new computed data than just creating new columns and filling them in the Python script. You can see that the ...
0
votes
1answer
27 views

which framework is good for closed intranet [on hold]

My requirement is simple. By latitude/longitude, draw icon on the map, draw a line between two icons.I may need put a customer picture over the map. It is not difficult by google map javascript or ...
2
votes
1answer
30 views

How to apply Log Transform to Flow Accumulation?

I have run a flow accumulation for a DEM that I'm working with. I'm trying to apply a log transform because I've heard it could give a better visual representation. How would I go about doing this ...
1
vote
1answer
18 views

convert XML to PostgreSQL using MATLAB

In a weeks time I should be able to transfer the GIS data provided in the XML format to PostgreSQL database. I have prepared the PostgreSQL database (empty) and looking at Matlab scripts. (I am on ...
1
vote
0answers
27 views

Why does clip only return the top polygon?

I'm running the command below on a data set with many stacked polygons. This is a county standard so I can't change the way they manage their data. Each type of polygon can be uniquely identified ...
1
vote
1answer
15 views

How to create a barrier feature class to use in a geometric network?

I am working with the NHD and need to isolate stream segments upstream of barriers. I have too many barriers (thousands) to do this manually using the Geometric Network barrier tool on the toolbar. ...
0
votes
0answers
15 views

Calculating rows in a attribute table of a point shape with QGis or Saga

I have a point shape with an attribut ("test"). I need to calculate the sum of the 1st four (id 1-4) "test" values and then the next 4 (id 5-8). Is there a chance to calculate this with the field ...
0
votes
0answers
7 views

ArcGIS Runtime for WPF basemap disappears when zoomed in

I have a problem where the http://services.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer basemap is disabled and the images are removed when you zoom in to a large scale. I've set ...

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