[gdal-dev] querry in updating attribute values using ogrdatasource
Hello,
I am trying to update shape file with attribute values .I am performing
following
functionality.
QFileInfo table1(_mActiveLayer); //_mActive Layer is name of file opened
QString tablename1;
tablename1=table1.baseName();
reader = OGRSFDriverRegistrar::Open(_mActiveLayer.toLatin1().data(), TRUE );
if(reader==NULL)
{
exit(0);
}
poLayer = reader-GetLayer(0);
querrysatatement=UPDATE +tablename1+ set SAL= 500 where EMPCODE = 1
;//table Name is name of the table releated to _mActiveLayer
QByteArray bnewconn = querrysatatement.toLatin1();
conninfonew = new char[bnewconn.length()+1];
strcpy(conninfonew,querrysatatement.toLatin1().data());
poLayer=reader-ExecuteSQL (conninfonew,NULL,dialect.toLatin1().data());
OutPut
syntax error in sql statement
Environment:
Unbuntu 12.04
Gdal version -- 1.9.2
geos version -- 3.3.3
Thanks in advance to all
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[gdal-dev] Generating Lat, long Cordinates with bearing line and angle
Hello, Thanks in advance I have a *lat, lon* coordinate with a known projection system I assume it a initial point. I want to generate a next Position with the an *angle* with (horizontal/vertical) and *bearing length* in lat,lon coordinates and complete it with angles and bearing lengths to form a polygon Any Help in the above context is highly appreciated ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
[gdal-dev] To know about centriod of a polygon shape file
Dear All, I am just working on Shape files I am unable to detect duplicate centroids in a shape file .After buffering a polygon does centroids of both will match Any help in greatly appreciated With Regards ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
[gdal-dev] Removing Dangle lines in shape files
Dear All, I am Trying to remove Dangle Lines from a shape file containing OGRLineString (polyline).I am thinking that if a line(2),line(3),line(4) crosses a another line(1) detecting the point of intersection and removing the part beyond line1 . I am employing following code and attaching it. Any suggestion is highly appreciated with Regards rmg_dangles.odt Description: application/vnd.oasis.opendocument.text ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
[gdal-dev] Identifying a line for dangle
hai to All, I am Trying to check for a line (OGRLINESTRING) to be a dangle or not. I am trying it out by checking each feature with remaining feature where any other feature(OGRLINESTRING) crosses its any of the node i am attaching a file any help is greatly appreciated With Regards Dangletxt.odt Description: application/vnd.oasis.opendocument.text ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
[gdal-dev] creating a shape from another with attributes and values
To All,
I am using the following code for creating a shape file from another with
the attributes value;
i am unable to fetch attribute values from source and change the features
from newly created
shape files
Any Sort of help is greatly appriciated
#include main.h
#includeQList
#includeQStringList
#includeQDebug
//OGRFeature* TranslateFeature(OGRFeature* poSrcFeature,OGRFeatureDefn
*poFeatureDefn);
OGRLayer*poSrcLayer;
OGRLayer*poDstLayer;
OGRDataSource *poDS;
OGRDataSource *poODS=NULL;
OGRFeature *poDstFeature;
OGRFeature *poSrcFeature;
OGRFeatureDefn *poFeatureDefn;
int main()
{
int iField;
const char *pszDriverName = ESRI Shapefile;
OGRSFDriver *poDriver;
OGRRegisterAll();
QListdoublefieldid;
QListQStringfieldname;
const char* str=indiaaa ;
poDriver = OGRSFDriverRegistrar::GetRegistrar()-GetDriverByName(
pszDriverName );
if( poDriver == NULL )
{
printf( %s driver not available.\n, pszDriverName );
exit( 1 );
}
poDS = poDriver-Open( /home/support/Images/IND_adm
(3)/IND_adm1.shp );
poSrcLayer=poDS-GetLayerByName(IND_adm1);
poDriver-DeleteDataSource(firsts1.shp);
poODS = poDriver-CreateDataSource( firsts1.shp, NULL );
poDstLayer = poODS-CreateLayer( firsts1,NULL,wkbPolygon);
poSrcLayer-ResetReading();
int i;
OGRGeometry *poGeometry;
// OGRGeometry *bufferGeometry;
poDstFeature = OGRFeature::CreateFeature(poDstLayer-GetLayerDefn());
poDstLayer-CreateFeature(poDstFeature);
poSrcFeature=poSrcLayer-GetNextFeature();
do{
i=1;
OGRFeatureDefn *poFDefn = poSrcLayer-GetLayerDefn();
int iField;
for( iField = 0; iField poFDefn-GetFieldCount();
iField++ )
{
qDebug()fieldcountpoFDefn-GetFieldCount();
printf(\n);
OGRFieldDefn *poFieldDefn = poFDefn-GetFieldDefn(
iField );
if( poFieldDefn-GetType() == OFTInteger )
{
printf( %d,, poSrcFeature-GetFieldAsInteger(
iField ) );
}
else if( poFieldDefn-GetType() == OFTReal )
{
printf( %.3f,,
poSrcFeature-GetFieldAsDouble(iField) );
fieldid.append(poSrcFeature-GetFieldAsDouble(
iField ));
}
else if( poFieldDefn-GetType() == OFTString )
{
printf( %s, Name,
poSrcFeature-GetFieldAsString(iField) );
fieldname.append(poSrcFeature-GetFieldAsString(iField));
}
else
{
printf( %s,name1,
poSrcFeature-GetFieldAsString(iField) );
fieldname.append(poSrcFeature-GetFieldAsString(iField));
}
}
poGeometry=poSrcFeature-GetGeometryRef();
poDstFeature-SetGeometryDirectly(poGeometry);
poDstLayer-CreateFeature(poDstFeature);
poDstFeature-SetFID(100);
// poDstFeature-SetField(i,str); // this is not modifying
// i++;
// //poDstFeature-SetFrom(poSrcFeature,true);
}while( (poSrcFeature = poSrcLayer-GetNextFeature()) != NULL );
poDstLayer-ResetReading();
qDebug()sizefieldname.size();
OGRDataSource::DestroyDataSource(poODS);
}
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[gdal-dev] errror in building qgis
Hello all, I am trying to build qgis for Qt in fedora I have INSTALLED dependies for Python pyqt. and sip It is building upto following Steps Scanning dependencies of target python_module_qgis_networkanalysis [ 92%] Building CXX object python/CMakeFiles/python_module_qgis_networkanalysis.dir/analysis/network/sipnetworkanalysispart0.cpp.o [ 92%] Building CXX object python/CMakeFiles/python_module_qgis_networkanalysis.dir/analysis/network/sipnetworkanalysispart1.cpp.o [ 92%] Building CXX object python/CMakeFiles/python_module_qgis_networkanalysis.dir/analysis/network/sipnetworkanalysispart2.cpp.o [ 92%] Building CXX object python/CMakeFiles/python_module_qgis_networkanalysis.dir/analysis/network/sipnetworkanalysispart3.cpp.o Linking CXX shared library ../output/python/qgis/networkanalysis.so [ 92%] Built target python_module_qgis_networkanalysis [ 92%] Generating ui_qgsplugininstallerbase.py Any Help for the above Problem is greatly apprieciated Thanking You ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
[gdal-dev] add my email
s.r.kriis...@gmail.com ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
[gdal-dev] to store a shapeFile with the following code getting problem assigning goemetries in translateLayer Function
#include main.h#include ogrsf_frmts.h#include ogr_p.h#include
cpl_conv.h#include cpl_string.h#include ogr_api.h#include
gdal.hstatic int TranslateLayer(OGRLayer
*poPassedLayer,OGRDataSource *ODS,char *pszNewLayerName,int
eGType);int main( ){ const char *pszFormat = ESRI Shapefile;
const char *pszDataSource =india_ds.shp; const char
*pszDestDataSource = out.shp; char *pszNewLayerName=NULL;
OGRLayer*poLayer; OGRDataSource *poDS;
OGRDataSource *poODS=NULL; const char *pszDriverName =
ESRI Shapefile; OGRSFDriver *poDriver;
OGRRegisterAll(); poDriver =
OGRSFDriverRegistrar::GetRegistrar()-GetDriverByName(
pszDriverName ); if( poDriver == NULL ) {
printf( %s driver not available.\n, pszDriverName );
exit( 1 ); } poODS = poDriver-*CreateDataSource*(
out.shp, NULL ); if( poODS == NULL ) {
printf( Creation of output file failed.\n ); exit( 1 );
} poDS = poDriver-*Open*( india_ds.shp );
poLayer=poDS-*GetLayerByName*(india_ds); if( poDS == NULL )
{ printf( Open failed.\n );
exit( 1 ); } int nLayerCount;
OGRLayer** papoLayers = NULL; nLayerCount =
poDS-*GetLayerCount*();printf(\n %d,nLayerCount);
papoLayers = (OGRLayer**)CPLMalloc(sizeof(OGRLayer*) *
nLayerCount);for( int iLayer = 0;
iLayer nLayerCount; iLayer++ ){
poLayer = poDS-*GetLayer*(iLayer);
papoLayers[iLayer] = poLayer;}
pszNewLayerName = CPLStrdup(CPLGetBasename(pszDestDataSource));
printf(%s,pszNewLayerName); printf(\n
%d,poLayer-*GetFeatureCount*());int eGType=5;
for( int iLayer = 0;iLayer nLayerCount;
iLayer++ ){ OGRLayer*poLayer =
papoLayers[iLayer]; if (poLayer == NULL)
continue; OGRLayer* poPassedLayer = poLayer;
if( !TranslateLayer( poPassedLayer,
poODS,pszNewLayerName, eGType)); {
exit(1); }} return
0;}static int TranslateLayer(OGRLayer *poSrcLayer,OGRDataSource
*poDstDS,char *pszNewLayerName,int eGType) {OGRLayer
*poDstLayer;OGRFeatureDefn *poSrcFDefn;OGRFeatureDefn
*poDstFDefn = NULL;OGRSpatialReference *poOutputSRS;
poSrcFDefn = poSrcLayer-*GetLayerDefn*();poOutputSRS =
poSrcLayer-*GetSpatialRef*();poDstLayer =
poDstDS-*GetLayerByName*(pszNewLayerName); poDstLayer =
poDstDS-*CreateLayer*( pszNewLayerName, poOutputSRS,
(OGRwkbGeometryType) eGType);
poDstLayer-*SetStyleTable*( poSrcLayer-*GetStyleTable* () );
int nSrcFieldCount = poSrcFDefn-GetFieldCount();
printf(%d,nSrcFieldCount ); poDstFDefn =
poDstLayer-*GetLayerDefn*(); OGRFeature *poFeature;
printf(\n 2 %d,poSrcLayer-*GetFeatureCount*()); OGRFeature
*poDstFeature = NULL;poSrcLayer-*ResetReading*();
while((poFeature = poSrcLayer-*GetNextFeature*()) != NULL)
{ poFeature = poSrcLayer-*GetNextFeature*();
OGRGeometry* poSrcGeometry =
poFeature-GetGeometryRef(); poDstFeature =
OGRFeature::CreateFeature( poDstLayer-*GetLayerDefn*() );
poDstFeature-*SetFID*( poFeature-GetFID() );
OGRGeometry* poDstGeometry = poDstFeature-GetGeometryRef();
poDstFeature-SetGeometry(poSrcGeometry); }
return 0;}
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[gdal-dev] to find area of Shape File
i am Trying To Find Area of A Polygon
with the Following Code
int main(){OGRRegisterAll();OGRLayer *poLayer;
OGRFeature *poFeature;OGRDataSource *poDS;poDS =
OGRSFDriverRegistrar::Open( first.shp);poLayer =
poDS-*GetLayerByName*( first);int
nCount=poDS-*GetLayerCount*();printf(%d,nCount);
poLayer-*ResetReading*();OGRGeometry *poGeometry;
OGRGeometryCollection *PoGC;
while((poFeature=poLayer-*GetNextFeature*())!=NULL){int
nCnt=poFeature-GetFieldCount();printf(\n %d,nCnt);
qDebug()entered;poGeometry=poFeature-GetGeometryRef();
if(poGeometry !=NULL
wkbFlatten(poGeometry-*getGeometryType*()) == wkbPolygon) {
PoGC-*addGeometry*(poGeometry); double area =
PoGC-*get_Area*() ;qDebug() area ; }}
return 0;}
i am getting Error
With Regards
siva
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[gdal-dev] to find area of shapeFile
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[gdal-dev] saving a shape File after obtaining from intersection from to two different shape Files
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