An object-oriented programming language
1
vote
1answer
121 views
QGIS Plugin Windows
I have written a QGIS plugin (RTools) which acts mostly like a independent plugin (minimal interaction with QGIS core functions). On Linux both QGIS and RTools were build using QT 4.8 on Qt creator. ...
0
votes
1answer
43 views
Featureclass search failing in C++. But working in C#
I need to perform search on a FeatureClass using ISpatialFilter for a given Point (x,y).
I wrote a program in C# to do that and its retrieving the features as expected. But the similar program in C++ ...
2
votes
0answers
50 views
Is there a way to distinguish between digitized and pasted features?
Is there a way to tell if an added feature in QGIS is in fact a newly digitized one or a pasted feature?
I think QGIS is treating both cases in the same way, emitting the same signal:
...
1
vote
0answers
27 views
how to get correct geo reference system for a VMap
I am new to GIS, trying to read the GeoRef System for VMap by using the following code:
OGRSpatialReference *ref = layer->GetSpatialRef();
if( ref )
{
QString georefSystem = ...
1
vote
0answers
75 views
OSGB36 referenced PNG to Google Earth
I am creating a PNG that is referenced to the OSGB36 datum (1 pixel per 50m easting/northing that is colored according to the result of some calculation code)
I want to display this on Google Earth ...
1
vote
0answers
120 views
Setup of development environment of QGIS on windows with qt creator
Can anyone help me in setting up environment for working on QGIS on windows using qt-creator?
I am using qt creator version 1.3.1,qt version 4.6 and QGIS version 1.8.
Thanks.
1
vote
0answers
103 views
gdallocationinfo from C++?
I need a C++ API to convert x,y Image Coordinates in their native projection to output image pixel,line coordnates. I see the gdallocationinfo documentation, but no API for it.
Where in online GDAL ...
1
vote
0answers
212 views
What do I need to build a C++ plugin on windows 7?
I want to make a plugin in C++ and I need to write and build it in windows (Im better with *nix systems).
While I have skimmed the various updated C++Plugin docs I can understand if I need to build ...
0
votes
0answers
17 views
How to extract an adjacency matrix from OSM?
I would like to use graph algorithms from the Boost graph library on OSM data. What are my choices to use Openstreetmaps data from within a C++ program ? I need at least a flat file with a list of ...
0
votes
0answers
64 views
using GDAL/OGR (faster)
Eventually, I was able to get the GDAL installed and compiled correctly using Visual C++ 2010. I even tested some of its methods on some geo-referenced raster files, and it looks like that all is ...
0
votes
0answers
29 views
Questions about modifying the Roadgraph plugin in QGIS
I've tried hard to modify the roadgraph plugin but get no progress in long time, cuz I have no experience about developing or modifying an QGIS plugin.
I want to use this plugin to give me distances ...
0
votes
0answers
56 views
Nearest point-line neighbour in GEOS
A harder question than the point-point one: can anyone tell me, in GEOS/C++ how to find all point-linesegment pairs closer than distance d given a set of points and a set of line segments?
I guess ...
0
votes
0answers
48 views
Connect to Esri map service using c++ in stand alone desktop app
Can anyone tell me how to do this? Here is my code. The Open call returns E_INVALIDARG.
IAGSServerConnectionFactoryPtr AGSConnectionFactory;
...
