[Qgis-developer] QgsRasterLayer::loadProviderLibrary: Failed to load

2013-01-22 Thread leena S 
i am trying to load a simple tif file as a raster layer with my qtcreator,
it was working fine with me before updating my ubuntu from 11.04 to 12.10
i keep getting QgsRasterLayer::loadProviderLibrary: Failed to load

QgsRasterLayer * mypLayer = new QgsRasterLayer(src,base);

if (mypLayer-isValid())/// always return invalid layer with ubuntu
12.10 but it is workin fine with ubuntu 11.04
{
emit error(Layer is valid);
}
else
{
emit error(Layer is NOT valid);
return;
}

how can i fix this problem ?
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[Qgis-developer] customizing my own symbols to be drawn on top of the vector layer

2012-11-13 Thread leena S 
hello everyone;

i am using QGraphicsScene, QGraphicsPolygonItem, QGraphicsLineItem,
QGraphicsEllipseItem and QGraphicsTextItem
to draw my own customized symbols, polygons or circles on top of my vector
layer.
just have a look at the attached screen shot to have a complete idea for
what am doing;

i dont think i can add my graphic scene widget on top of my map canvas and
even if i was able to am trying to draw these symbols on top of a vector
layer
 to be able to adjust the symbols' location in case i triggered zoom in,
out or pan;
i dont want the symbols to be separated from my vector layer since ill be
drawing my symbols according to specific coordinates on my raster layer
which is my map;

so any idea how can i do that ?
attachment: waypoints.png___
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Re: [Qgis-developer] how can i use my own map tiles in qgis?

2012-10-02 Thread leena S 
that didnt work for me, i tried to specify my main tiles directory and
thats what i got:

gdalbuildvrt does not support ungeoreferenced image. Skipping
/home/FWTools-linux-x86_64-3.0.6/temp/6/41/36.png


there was lot of erros since it is complaining about every single tile;

i used gdal2tiles to converte my tiff file to tiles and there is an xml
file called tilemapresource.xml with the followin content


?xml version=1.0 encoding=utf-8?
TileMap version=1.0.0 tilemapservice=http://tms.osgeo.org/1.0.0;
Titletemp.vrt/Title
Abstract/Abstract
SRSEPSG:900913/SRS
BoundingBox minx=22.37058246975111 miny=50.8756619998
maxx=26.5132336000 maxy=56.70930444051041/
Origin x=22.37058246975111 y=50.8756619998/
TileFormat width=256 height=256 mime-type=image/png extension=png/
TileSets profile=mercator
TileSet href=5 units-per-pixel=4891.96980937500030 order=5/
TileSet href=6 units-per-pixel=2445.98490468750015 order=6/
TileSet href=7 units-per-pixel=1222.99245234375007 order=7/
TileSet href=8 units-per-pixel=611.49622617187504 order=8/
TileSet href=9 units-per-pixel=305.74811308593752 order=9/
TileSet href=10 units-per-pixel=152.87405654296876 order=10/
TileSet href=11 units-per-pixel=76.43702827148438 order=11/
TileSet href=12 units-per-pixel=38.21851413574219 order=12/
TileSet href=13 units-per-pixel=19.10925706787109 order=13/
/TileSets
/TileMap


On Tue, Oct 2, 2012 at 2:43 AM, Alister Hood alister.h...@synergine.comwrote:

 Hi Leena,
 You never confirmed why you need to do this.  Did you ever try
 RasterMiscellaneousBuild Virtual Raster (catalog)?

 Regards,
 Alister

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Re: [Qgis-developer] how can i use my own map tiles in qgis?

2012-10-01 Thread leena S 
okey this is really confusing i dont know if am in the right track i just
need a direction where to start with;
all what am trying to do is loading my own offline tiles into qgis to be
able to zoom in and out pan ..etc instead of implementing everything from
scratch;

so this is all what i have been doing:
1) i converted my geotiff to tiles through gdal2tiles and i got my tiles
which is a set of files, and as i mentioned in my last email this is how my
folder looks like:

= 5 (zoom level 5)
== 20 (x)
=== 18.png (y)
.
.
.
= 13 (zoom level 13)
== 5253 (x)
=== 4618.png (y)

now i wanna know if i can load my tiles without using tilecache or
mapserver coz as i said i dont need to view my map as a web based
application;

can u tell me how did you manage to make it work with the following xml
file ?

GDAL_WMS
 Service name=TMS
 ServerUrlfile:///mytiles/${z}/${x}/${y}.png/ServerUrl
 /Service
 DataWindow
 UpperLeftX-20037508.34/UpperLeftX
 UpperLeftY20037508.34/UpperLeftY
 LowerRightX20037508.34/LowerRightX
 LowerRightY-20037508.34/LowerRightY

 TileLevel18/TileLevel
 TileCountX1/TileCountX
 TileCountY1/TileCountY
 YOrigintop/YOrigin
 /DataWindow

 ProjectionEPSG:900913/Projection
 BlockSizeX256/BlockSizeX
 BlockSizeY256/BlockSizeY
 BandsCount3/BandsCount
 Cache /
  /GDAL_WMS

what configuration did u use to make it work ?


On Mon, Sep 24, 2012 at 5:14 PM, leena S qgis.dev0...@gmail.com wrote:

 ok now i am using Quantum gis 1.8.0 with gdal1.7.0

 when i load my xml file with quantum gis using add raster layer icon, i
 get nothin;

 am still confused about gdal and wms server .. i dont know how does it
 work exactly;


 ServerUrlfile:///mytiles/${z}/${x}/${y}.png/ServerUrl

 this is how myTiles folder looks like starting from zoom lvl 5 to 13:

 = 5 (zoom level 5)
 == 20 (x)
 === 18.png (y)
 .
 .
 .
 = 13 (zoom level 13)
 == 5253 (x)
 === 4618.png (y)

 am i missin any configuration for my tiles ? i dont really know if wms is
 able to get the tiles this way;


 On Sun, Sep 23, 2012 at 1:38 PM, Nathan Woodrow madman...@gmail.comwrote:

 On Sun, Sep 23, 2012 at 7:26 PM, leena S qgis.dev0...@gmail.com wrote:
  thanks for your reply, i updated my xml file but all what i get is a
 black
  screen when i load my xml file as a raster layer in qgis;
  am usin qgis version 1.4.0 with gdal 1.7.0;
 
  my OS is ubuntu 11.04

 For a start I would suggest updating to a newer version of QGIS. 1.4
 is very very old.

 - Nathan



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Re: [Qgis-developer] how can i use my own map tiles in qgis?

2012-09-23 Thread leena S 
thanks for your reply, i updated my xml file but all what i get is a black
screen when i load my xml file as a raster layer in qgis;
am usin qgis version 1.4.0 with gdal 1.7.0;

my OS is ubuntu 11.04

On Fri, Sep 21, 2012 at 1:07 PM, Marco Lechner - FOSSGIS e.V. 
marco.lech...@fossgis.de wrote:

 Hi Leena,

 try this - works fo rme but depends on QGIS/GDAL-version you use

 Marco

 GDAL_WMS
 Service name=TMS
 ServerUrlfile:///mytiles/${z}/${x}/${y}.png/ServerUrl !--
 M$ Windows = file://C:/mytiles/${z}/${x}/${y}.png --
 /Service
 DataWindow
 UpperLeftX-20037508.34/UpperLeftX
 UpperLeftY20037508.34/UpperLeftY
 LowerRightX20037508.34/LowerRightX
 LowerRightY-20037508.34/LowerRightY
 TileLevel18/TileLevel
 TileCountX1/TileCountX
 TileCountY1/TileCountY
 YOrigintop/YOrigin
 /DataWindow
 ProjectionEPSG:900913/Projection
 BlockSizeX256/BlockSizeX
 BlockSizeY256/BlockSizeY
 BandsCount3/BandsCount
 Cache /
 /GDAL_WMS



 Am Do 20 Sep 2012 15:19:32 CEST schrieb Ivan Mincik:
  On 09/20/2012 01:51 PM, leena S wrote:
  i understand that i can load tiles from any web server using gdal WMS;
  and i used http://www.gdal.org/frmt_wms.html to create my xml file;
 
  but instead of using google map or openstreet map tiles i wanna use my
 own
  tiles to create the raster layer;
 
  I am not sure if I understand You correctly.
  If You want to load multiple georeferenced images from Your local
  directory as one layer, You can use 'gdalbuildvrt' to create virtual
  raster and load it to QGIS.
 



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 http://www.fossgis.de
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 Besuchen Sie uns
 vom 09.-11.10.2012 in Halle 7
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[Qgis-developer] how can i use my own map tiles in qgis?

2012-09-20 Thread leena S 
i understand that i can load tiles from any web server using gdal WMS;
and i used http://www.gdal.org/frmt_wms.html to create my xml file;

but instead of using google map or openstreet map tiles i wanna use my own
tiles to create the raster layer;

i have tried to change the server url to localhost since i have all of my
tiles locally

GDAL_WMS
Service name=TMS
ServerUrlhttp://localhost/home/myTiles/${z}/${x}/${y}.png
/ServerUrl
/Service
DataWindow
UpperLeftX-20037508.34/UpperLeftX
UpperLeftY20037508.34/UpperLeftY
LowerRightX20037508.34/LowerRightX
LowerRightY-20037508.34/LowerRightY
TileLevel13/TileLevel
TileCountX1/TileCountX
TileCountY1/TileCountY
YOrigintop/YOrigin
/DataWindow
ProjectionEPSG:4326/Projection
BlockSizeX256/BlockSizeX
BlockSizeY256/BlockSizeY
BandsCount3/BandsCount
Cache /
/GDAL_WMS

however when i load this xml file to quantum gis all what i get is a black
screen;
i am not really sure but is that the right way of doing it if i wanna use
my own map tiles ?
i appreciate any help or direction;

thanks in advance;
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