Недоработки и проблемы с mapVisibilityZone

    TBUILDZONEVISIBILITY bzv;
    memset( &bzv, 0, sizeof( TBUILDZONEVISIBILITY));
    double x, y;
    m_projection->geo2Plane( center.m_lat, center.m_lon, x, y);
    bzv.PointCenter.x = x;
    bzv.PointCenter.y = y;
    bzv.RadiusMeter = distance;
    bzv.Azimuth = azimuth * M_PI / 180.;
    bzv.Angle = viewAngle * M_PI / 180.;
    bzv.DeltaHight = height;
    bzv.DeltaObservation = 0;
    bzv.VisionRst = 0;
    bzv.StyleRst = 1;
    bzv.ColorRst = 0xFF;
    bzv.Inversion = 0;
    rstNum = mapVisibilityZone( m_hMap, namerst, &bzv);

    double resAzimuth = 0;
    HOBJ obj = mapCreateObject( m_hMap);
    mapAppendSemantic( obj, 67, "13", 5);
    mapRegisterObject( obj, 81110000, LOCAL_LINE);
    mapAppendPointGeo( obj, lat0 * TO_RAD, lon0 * TO_RAD);
    mapAppendPointGeo( obj, lat1 * TO_RAD, lon1 * TO_RAD);
    resAzimuth = mapSideAzimuth( obj, 1, 0);
    mapClearObject( obj);
    mapFreeObject( obj);
    return resAzimuth * 180. / M_PI;