0
votes
0answers
2 views

using css sprites in Openlayers 2 instead of icons

I'm using Openlayers 2 with Gmaps and a vector layer to display features with icons. I'm using this code to set the icons on the features: feature.style = { externalGraphic : iconUrl, ...
0
votes
0answers
1 view

External Standalone QGIS Application with Default Toolbars

I want to develop a standalone application and add the default digitizing and advanced digitizing tools in QGIS as-is on my application through PyQGIS. Is it similar the way you add the navigation ...
0
votes
1answer
27 views

QGIS Spatialite Views problems

I am trying to wrap my head around spatialite views in QGIS. However there are severe limitations that make it very cumbersome: Spatialite views in QGIS do no update, if the corresponding tables in ...
1
vote
0answers
10 views

How can I do a subquery inside a subquery in PostGIS?

I need to add a subquery to a working function. Instead of select * from table, I'd like to select * from (select * from table where height>1500) as sub, something that works in other functions I ...
0
votes
0answers
6 views

OpenStreetMap building layer

I wonder how the building layer in OSM is generated? Are they generated using aerial imagery with image segmentation/classification techniques or they are from crowd sourced tagging.
0
votes
0answers
14 views

Serving GeoTIFFs of different resolutions as single layer

I'm trying to serve a 30 arc second DEM with global coverage combined with high resolution 1/3 arc second DEM for a very small area. I believed at first I could combine them into a single file, ...
9
votes
2answers
1k views

Why does one part of GML -> KML conversion not work on Google Maps?

Brand new to all of this, not even sure this is the right forum to ask in... I have a client who wants to visualise cancer incidence and mortality rates by local/unitary authority across Great ...
6
votes
1answer
200 views
+50

How can I create a form so the user has to be authenticated to access a project?

I have a login form in QGIS and when it is loaded, python gives me an error for, apparently, not recognizing the findchild part. This is due to the fact that the form isn't loaded before the script is ...
11
votes
5answers
2k views

how can i convert a shapefile to lat and lon boundaries?

i have a shapefile of country subdivisions and i would like to extract an array of bounding lat and lon for each division.. is it possible to do?
0
votes
0answers
14 views

creating a database

I have never created a database and had some questions while I am doing my research. I need the database to have maps and have access to files stored on my server, I think that is the correct ...
0
votes
0answers
4 views

Openlayers 3: Custom Tiles 512x512 with specific folder structure and uncommon file names

I would like to use custom tiles of the size 512x512 pixels with a specific folder structure: "http://localhost/{z}/{x}_{y}_512_512.png" Unfortunately the folder names do not correspond to the ...
0
votes
1answer
9 views

How to create grid from 2 separate images of latitude and longitude

I have two separate images of latitude and longitude, and want to create a grid from them so I can assign it to my Non-Geo referenced file... How can I create it, particularly in Matlab... But other ...
0
votes
0answers
7 views

Rendering Problem: OpenStreetMap Server CentOS 7

The Problem I'm trying to install an OpenStreetMap server on CentOS 7. I'm using mapnik 2.2.0 and PostGis 2.0. When I try to render the tiles for the server I get the following error: ...
2
votes
2answers
146 views

Las dataset to raster with ground points only

I'm trying to make a raster from a las dataset. I want to only use points classified as ground, but I can't figure out how to do this. What I've tried is: Create las dataset from 2 .las files. ...
1
vote
0answers
6 views

Adding separate distance files to calculate total distance in ArcGIS

I have two raster files: A raster of distance-to-outlet for a creek. Value = 0 at creek outlet (white), and the maximum value is at the beginning of the creek (black). A raster of Euclidean ...
2
votes
1answer
35 views

Legal standpoint of using open source map data in proprietary software?

I am planning to use an API call to something like http://overpass-api.de/api/interpreter?data=... to gather raw GIS data for an application I am working on. Can anyone tell me if that affects my ...
0
votes
0answers
5 views

How to set QGIS mapCanvas to exact values

My QGIS 2.8.2 standalone app's mapCanvas fills a central widget with a fixed quadratic size x=y=1000 pixels. When I set the mapCanvas extent() to an area defined quadratic as well given by a ...
1
vote
1answer
38 views

Georeferencing las files using liblas

I am trying to write georeferencing information to a '.las' file using liblas and c++. Here is my code: ofstream ofs; ofs.open("test.las", ios::out | ios::binary); liblas::Header header; ...
1
vote
1answer
34 views

Elevation data from 3D shapefile of buildings to raster DEM

I have acquired LoD2 building models in the 3DShape format (Polygon ZM). This LoD2 data needs to be prepared for a R-script of solar irradiation calculations on roof surfaces, but which can only ...
1
vote
1answer
42 views

How to SELECT all points within a GeoJSON polygon in PostGIS

I have a GeoJSON polygon, and a table with lots of points. I want to SELECT all points that are within an arbitrary GeoJSON polygon. How can I do that with PostGIS SQL?
2
votes
1answer
19 views

LiDAR intensity image from multiple flight lines?

I'm working with multiple raw las tiles, and I've used Fusion to create an intensity image, but it shows the flight line overlap (see below). Any idea how can I smooth the image so that the overlap is ...
1
vote
1answer
6 views

How to use GRASS v.kernel to calculate point densities along a network?

In a road network, I need to select the segments where a minimum of 5 dots occur (1 dot = 1 address) over a distance of 100 m (the image attached illustrates my question). I'm trying to use GRASS ...
0
votes
1answer
25 views

Arcobjects vb.net stringbuilder

I'm newbie and have question about string builder to show the arcgis layers. (System: ArcGis 10.2, VisualStudio2012) I don't succeed to show the loaded layers in a line of the message box. code: ...
2
votes
2answers
300 views

Bind GNSS receiver with android app over bluetooth

I'm looking to integrate a GNSS receiver with a Smartphone app. I've found only GNSS receivers that are meant to communicate only with their mobile interface, they don't provide any documentation for ...
0
votes
1answer
227 views

WMS GetfearureInfo popup not getting

I am new to openlayers, used this link to get feature information of WMS layer of geoserver. If I clicked on any feature its continuously loading not displaying any popup. Can any one please help me ...
1
vote
3answers
20 views

Format for viewing vector files offline and mobile

I wish to create a custom mobile application for Android and/or iOS for a school project that will allow a user to view (not edit, just view) specified ESRI shapefiles while offline. Shapefiles at ...
0
votes
0answers
8 views

Creating water utility network

A water treatment plant wants to create utility map that allows them to upload data in real-time through a separate monitoring service they subscribe to (through Verizon Wireless) and then use this to ...
0
votes
0answers
9 views

How to create a new empty vector layer that has the same set of atributes as another layer and then copy a subset of features into it?

Please excuse the crudeness of it all. I'm a noob with both python and QGIS. Here's a sample of my code: unique = layer.uniqueValues(index) attributes = layer..dataProvider().fields().toList() ...
2
votes
1answer
48 views

After how much distance does the x,y coordinate system become noticeably distorted?

I'm working with maritime sensors that give information of moving objects it detects, in azimuth, range and elevation, and we convert it to x,y coordinates for our application to be able to process ...
2
votes
2answers
80 views

How do I make equidistant circles covering the whole globe in QGIS?

What's the simplest way to make equidistant circles in PostGIS/QGIS? (my software versions are Postgres 9.3, PostGIS is 2.1, QGIS 2.10) I tried this in PostGIS, but the circles that come near or ...
0
votes
1answer
20 views

How do I transfer one field name from text file to a new field name in feature class?

I am working on a script that involves incidents of fire. I'm taking my values from a text file that is comma delimited. The first line of the text file contains the field names ...
0
votes
0answers
6 views

spatial autocorrelation and calculation of autocovariate term

I was reading some literature on spatial modeling, where it is stressed that in using regression (e.g., the Generalized Linear Model family, comprising Logistic Regression for example) the possible ...
0
votes
1answer
7 views

Creating a Polygon by clicking on a website embedded Google Earth

I have to create a Polygon on Google Earth which is embedded in my website as it is made in the Google Earth application. I managed to create a polygon already but i can only create it with the ...
0
votes
1answer
161 views

Copying representation symbology from one ArcSDE version to another?

We are having problems with our representations when copying from an ArcGIS 9.3 database to a 10.0. Representation symbologies with dash patterns (dots, dotted lines etc.) are reset to default ...
0
votes
1answer
20 views

Is there any WCS service example with Mapserver?

I want to publish tiff image in browser using Mapserver, for obtaining elevation data. Is there any resource or example regarding this.
0
votes
0answers
4 views

add different custom SVG markers to categorized section using pyqgis

I am trying to find a way to add different custom SVG markers to the categorized symboling. I would like to have different symbols for different values but unfortunately I cannot find a way to do it ...
0
votes
1answer
27 views

Problem importing sqlite into Postgres (with PostGis) using ogr2ogr

I am trying to import a very large sqlite file into Postgres SQL 9.3. The first tool I tried to use was OGR2GUI (http://www.ogr2gui.ca/). The 64 Bit version does nothing, whilst the 32 bit version ...
0
votes
0answers
5 views

How to get data for ArcPad witout forms in .apl file

I am trying to get data for ArcPad without forms ( <FORMS>) in .apl file. Can i do it? My .apl file is: <xml version="1.0" encoding="UTF-8"?> <ArcPad> <LAYER ...
0
votes
0answers
7 views

Custom QGIS Processing Tool Fails to Copy Features

I'm creating a custom QGIS Processing plugin. I've created a tool that is basically supposed to copy features from an input PostGIS layer to a new PostGIS layer. My routine runs without errors and ...
0
votes
1answer
201 views

Problem opening GRASS GUI: libgeos-3.3.6.so: cannot open shared object file:

I have been using GRASS to process some Landsat imagery but very recently, and as far as I am aware - after having done nothing different or changing the settings, I am trying to use GRASS and on ...
0
votes
1answer
29 views

How to calculate the distance between a line and a point (using lat/lon coordinates)

In my Android app, I need to calculate the distance from a point (the device's location, which is a lat/lon coordinate) to a line (defined by two lat/lon coordinates), and get the result in meters. ...
0
votes
0answers
23 views

Wrong axis order in geotools crs when reading from EPSG:4326 [duplicate]

Map<String,Object> params = ...; // postgis params DataStore dataStore = DataStoreFinder.getDataStore(params); SimpleFeatureCollection collection=...;// collection to save SimpleFeatureType ...
1
vote
2answers
40 views

How to get PostGIS DB name from QGIS layer?

I'm writing a custom Processing script that needs to know which database connection a vector layer resides in. I can't find anywhere in the API a function to return this information from a layer. So I ...
1
vote
1answer
26 views

Is Create Spatial Type necessary

When I enable an enterprise geodatabase for a database in postgresql, the st_geometry type get installed with it. So Is it necessary to use "Create Spatial Type" tool to create st_geometry type in ...
0
votes
0answers
9 views

Merge raster layers error

Is there an issue with the SAGA-tool "Mosaicking rasters"? I tried it with different rasters. In Sage itself it works fine. Algorithmus Mosaick raster layers startet... io_gdal 0 -TRANSFORM ...
0
votes
0answers
7 views

atmospheric correction using Grass

i am using grass6.4.4 presently. i.atcorr for atmospheric correction is used.now i would like to add Landsat8 sensor to the project(build) currently what i am using. if i copy the iwave.cpp file of ...
1
vote
2answers
15 views

Is publishing geodata in unprojected latlon coordinates better than a local UTM projection?

This is meant as some kind of reference Q&A. Unless I am working with truly global data, I always prefer projected, local, metric coordinates so that calculations like area or distances are ...
1
vote
1answer
3 views

Fusion table connexion issue

I'm trying to import some data from a SHP to GFT (Google Fusion Table). I get a 401 error. I'm using an Ubuntu 14.04 LTS Linux 64 bits with GDAL 1.11.0, released 2014/04/16. GFT is available (tested ...
0
votes
0answers
14 views

Exporting Matrix from ArcGIS (so readable in R)

I would like to eventually create a shape file in ArcGIS and then extract it as a matrix to be read by a spatial package I use in R. My first step is to create a simple binary matrix of a map (UK for ...
0
votes
0answers
5 views

GRASS7. Parallel import shapefiles failed

I am trying to import a 8 ShapeFile to GRASS V7.0.0. Each shapefile's size is between 80 Mb and 300 Mb. For this purpose, I've used multiprocessing in python. I run 4 parallel processes, each one ...

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