osgeo.gnm module

osgeo.gnm.CastToGenericNetwork(MajorObject base) → GenericNetwork

osgeo.gnm.CastToNetwork(MajorObject base) → Network

osgeo.gnm.DontUseExceptions(): Disable exceptions in all GDAL related modules (osgeo.gdal, osgeo.ogr, osgeo.osr, osgeo.gnm). Note: prior to GDAL 3.7, this only affected the calling module

class osgeo.gnm.ExceptionMgr(useExceptions=True)

Bases: object

Context manager to manage Python Exception state for GDAL/OGR/OSR/GNM.

Separate exception state is maintained for each module (gdal, ogr, etc), and this class appears independently in all of them. This is built in top of calls to the older UseExceptions()/DontUseExceptions() functions.

Example:

>>> print(gdal.GetUseExceptions())
0
>>> with gdal.ExceptionMgr():
...     # Exceptions are now in use
...     print(gdal.GetUseExceptions())
1
>>>
>>> # Exception state has now been restored
>>> print(gdal.GetUseExceptions())
0

class osgeo.gnm.GenericNetwork(*args, **kwargs)

Bases: Network

Proxy of C++ GNMGenericNetworkShadow class.

ChangeAllBlockState(GenericNetwork self, bool bIsBlock=False) → CPLErr

ChangeBlockState(GenericNetwork self, GIntBig nFID, bool bIsBlock) → CPLErr

ConnectFeatures(GenericNetwork self, GIntBig nSrcFID, GIntBig nTgtFID, GIntBig nConFID, double dfCost, double dfInvCost, GNMDirection eDir) → CPLErr

ConnectPointsByLines(GenericNetwork self, char ** papszLayerList, double dfTolerance, double dfCost, double dfInvCost, GNMDirection eDir) → CPLErr

CreateRule(GenericNetwork self, char const * pszRuleStr) → CPLErr

DeleteAllRules(GenericNetwork self) → CPLErr

DeleteRule(GenericNetwork self, char const * pszRuleStr) → CPLErr

DisconnectFeatures(GenericNetwork self, GIntBig nSrcFID, GIntBig nTgtFID, GIntBig nConFID) → CPLErr

DisconnectFeaturesWithId(GenericNetwork self, GIntBig nFID) → CPLErr

GetRules(GenericNetwork self) → char **

ReconnectFeatures(GenericNetwork self, GIntBig nSrcFID, GIntBig nTgtFID, GIntBig nConFID, double dfCost, double dfInvCost, GNMDirection eDir) → CPLErr

property thisown: The membership flag

osgeo.gnm.GetUseExceptions() → int

class osgeo.gnm.Network(*args, **kwargs)

Bases: MajorObject

Proxy of C++ GNMNetworkShadow class.

CommitTransaction(Network self) → OGRErr

CopyLayer(Network self, Layer src_layer, char const * new_name, char ** options=None) → Layer

CreateLayer(Network self, char const * name, SpatialReference srs=None, OGRwkbGeometryType geom_type=wkbUnknown, char ** options=None) → Layer

DeleteLayer(Network self, int index) → OGRErr

DisconnectAll(Network self) → CPLErr

GetFeatureByGlobalFID(Network self, GIntBig GFID) → Feature

GetFileList(Network self) → char **

GetLayerByIndex(Network self, int index=0) → Layer

GetLayerByName(Network self, char const * layer_name) → Layer

GetLayerCount(Network self) → int

GetName(Network self) → char const *

GetPath(Network self, GIntBig nStartFID, GIntBig nEndFID, GNMGraphAlgorithmType eAlgorithm, char ** options=None) → Layer

GetProjection(Network self) → char const *

GetProjectionRef(Network self) → char const *

GetVersion(Network self) → int

ReleaseResultSet(Network self, Layer layer)

RollbackTransaction(Network self) → OGRErr

StartTransaction(Network self, int force=FALSE) → OGRErr

TestCapability(Network self, char const * cap) → bool

property thisown: The membership flag

osgeo.gnm.UseExceptions(): Enable exceptions in all GDAL related modules (osgeo.gdal, osgeo.ogr, osgeo.osr, osgeo.gnm). Note: prior to GDAL 3.7, this only affected the calling module