Classes for reading S57 format

Maps > Predefined Readers > The S57 Map Reader > Classes for reading S57 format

The class for reading S57 formats is the IlvS57Loader. This class is a subclass of the IlvMapFeatureIterator and returns one IlvMapFeature object for each S57 feature (S57 FRID record).

The following code shows how to use IlvS57Loader class to read a S57 catalog file and to use the IlvS57Renderer class to transform the map features to graphic objects.

IlvDisplay* display = ...;

IlvGraphic* graphic;

IlvManager* m = ...;

const IlvFeatureAttributeProperty* ap;

IlvMapInfo* mapInfo = ...;

Const char* filename = "catalog.030";

IlvMapsError status = IlvMaps::NoError();

IlvS57Loader reader(display);

reader.setFilename(filename);

IlvFeatureRenderer* renderer =

reader.getDefaultFeatureRenderer(display);

for (const IlvMapFeature* f = reader.getNextFeature(status);

status == IlvMaps::NoError() && f ;

f = reader.getNextFeature(status)) {

graphic = renderer->makeGraphic(*f, *mapInfo, status);

if (graphic) {

ap = f->getAttributes();

m->addObject(graphic);

if (ap)

graphic->setNamedProperty(ap->copy());

}

Version 6.1