vtdata library
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Public Member Functions | |
bool | SaveToSHP (const char *filename, bool progress_callback(int)=0) const |
bool | LoadFromOGR (OGRLayer *pLayer, bool progress_callback(int)=0) |
virtual void | LoadGeomFromSHP (SHPHandle hSHP, bool progress_callback(int)=0)=0 |
bool | LoadFromSHP (const char *fname, bool progress_callback(int)=0) |
bool | LoadDataFromDBF (const char *filename, bool progress_callback(int)=0) |
bool | LoadFieldInfoFromDBF (const char *filename) |
bool | LoadDataFromCSV (const char *filename, bool progress_callback(int)=0) |
bool | SaveToKML (const char *filename, bool progress_callback(int)=0) const |
void | SetFilename (const vtString &str) |
vtString | GetFilename () const |
virtual uint | NumEntities () const =0 |
void | SetNumEntities (int iNum) |
void | AllocateFeatures () |
OGRwkbGeometryType | GetGeomType () const |
void | SetGeomType (OGRwkbGeometryType eGeomType) |
bool | AppendDataFrom (vtFeatureSet *pFromSet) |
virtual void | Reserve (int iNum)=0 |
virtual bool | ComputeExtent (DRECT &rect) const =0 |
virtual void | Offset (const DPoint2 &p, bool bSelectedOnly=false)=0 |
virtual bool | TransformCoords (OCTransform *pTransform, bool progress_callback(int)=0)=0 |
virtual bool | AppendGeometryFrom (vtFeatureSet *pFromSet)=0 |
virtual int | NumTotalVertices () const |
virtual bool | EarthExtents (DRECT &ext) const =0 |
void | SetToDelete (int iFeature) |
int | ApplyDeletion () |
void | Select (uint iEnt, bool set=true) |
bool | IsSelected (uint iEnt) const |
uint | NumSelected () const |
void | DeselectAll () |
void | InvertSelection () |
int | SelectByCondition (int iField, int iCondition, const char *szValue) |
void | DeleteSelected () |
bool | IsDeleted (uint iEnt) |
int | DoBoxSelect (const DRECT &rect, SelectionType st) |
void | Pick (uint iEnt, bool set=true) |
bool | IsPicked (uint iEnt) |
void | DePickAll () |
uint | NumFields () const |
Field * | GetField (int i) |
const Field * | GetField (int i) const |
Field * | GetField (const char *name) |
int | GetFieldIndex (const char *name) const |
int | AddField (const char *name, FieldType ftype, int string_length=40) |
int | AddRecord () |
void | DeleteFields () |
void | SetValue (uint record, uint field, const char *string) |
void | SetValue (uint record, uint field, int value) |
void | SetValue (uint record, uint field, double value) |
void | SetValue (uint record, uint field, bool value) |
void | GetValueAsString (uint record, uint field, vtString &str) const |
void | SetValueFromString (uint iRecord, uint iField, const vtString &str) |
void | SetValueFromString (uint iRecord, uint iField, const char *str) |
int | GetIntegerValue (uint iRecord, uint iField) const |
short | GetShortValue (uint iRecord, uint iField) const |
float | GetFloatValue (uint iRecord, uint iField) const |
double | GetDoubleValue (uint iRecord, uint iField) const |
bool | GetBoolValue (uint iRecord, uint iField) const |
void | SetProjection (const vtCRS &proj) |
vtCRS & | GetAtProjection () |
vtFeature * | GetFeature (uint iIndex) const |
vtFeature * | GetFirstSelectedFeature () const |
Protected Member Functions | |
virtual bool | IsInsideRect (int iElem, const DRECT &rect)=0 |
virtual void | CopyGeometry (uint from, uint to)=0 |
virtual void | SaveGeomToSHP (SHPHandle hSHP, bool progress_callback(int)=0) const =0 |
virtual void | SetNumGeometries (int iNum)=0 |
void | CopyEntity (uint from, uint to) |
void | ParseDBFFields (DBFHandle db) |
void | ParseDBFRecords (DBFHandle db, bool progress_callback(int)=0) |
Protected Attributes | |
OGRwkbGeometryType | m_eGeomType |
std::vector< vtFeature * > | m_Features |
vtArray< Field * > | m_fields |
vtCRS | m_proj |
vtString | m_strFilename |
vtFeatureSet contains a collection of features which are just abstract data, without any specific correspondence to any aspect of the physical world. This is the same as a traditional GIS file (e.g. ESRI Shapefile).
Examples: political and property boundaries, geocoded addresses, flight paths, place names.
int vtFeatureSet::AddField | ( | const char * | name, |
FieldType | ftype, | ||
int | string_length = 40 |
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Add a data field to this featureset. The field contain a value of any type, for every entity.
name | Name of the new field. |
ftype | Type of the new field. |
string_length | For backward compatibility with the old SHP/DBF file formats, this is the maximum length of a string, for string fields. It has no effect unless you save this featureset to a SHP/DBF file. |
bool vtFeatureSet::AppendDataFrom | ( | vtFeatureSet * | pFromSet | ) |
Append the contents of another featureset to this one. The two featuresets must have the same geometry type. Only fields with matching names are copied in the record data.
int vtFeatureSet::GetFieldIndex | ( | const char * | name | ) | const |
Return the index of the field with the given name, or -1 if no field with that name was found.
OGRwkbGeometryType vtFeatureSet::GetGeomType | ( | ) | const |
Returns the type of geometry that each feature has.
bool vtFeatureSet::LoadDataFromCSV | ( | const char * | filename, |
bool | progress_callbackint = 0 |
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Load a featureset's field data from a comma-separated-value (CSV) file.
filename | filename in UTF-8 encoding. |
progress_callback | Provide a callback function if you want to receive progress indication. |
bool vtFeatureSet::LoadDataFromDBF | ( | const char * | filename, |
bool | progress_callbackint = 0 |
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Load a featureset's field data from a DBF file
filename | Filename in UTF-8 encoding. |
progress_callback | Provide a callback function if you want to receive progress indication. |
bool vtFeatureSet::LoadFieldInfoFromDBF | ( | const char * | filename | ) |
A lightweight alternative to LoadDataFromDBF, which simply reads the field descriptions from the DBF file.
bool vtFeatureSet::LoadFromSHP | ( | const char * | fname, |
bool | progress_callbackint = 0 |
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Load a featureset from a SHP (ESRI Shapefile).
fname | filename in UTF-8 encoding. |
progress_callback | Provide a callback function if you want to receive progress indication. |
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pure virtual |
If you know how many entities you will be adding to this FeatureSet, is it more efficient to reserve space for that many.
Implemented in vtFeatureSetPolygon, vtFeatureSetLineString3D, vtFeatureSetLineString, vtFeatureSetPoint3D, and vtFeatureSetPoint2D.
bool vtFeatureSet::SaveToKML | ( | const char * | filename, |
bool | progress_callbackint = 0 |
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) | const |
Export a featureset to a KML file. This is still very limited and experimental.
filename | Filename in UTF-8 encoding. |
progress_callback | Provide a callback function if you want to receive progress indication. |
bool vtFeatureSet::SaveToSHP | ( | const char * | filename, |
bool | progress_callbackint = 0 |
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) | const |
Save a featureset from a SHP (ESRI Shapefile) with corresponding DBF file
filename | Filename in UTF-8 encoding. |
progress_callback | Provide a callback function if you want to receive progress indication. |
void vtFeatureSet::SetGeomType | ( | OGRwkbGeometryType | eGeomType | ) |
Set the type of geometry that each feature will have.
eGeomType |
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void vtFeatureSet::SetNumEntities | ( | int | iNum | ) |
Set the number of entities. This expands (or contracts) the number of geometry entities and corresponding records.