Method addWktVlr

io/LasWriter.cpp:529–573

Add a Well-known Text VLR associated with the spatial reference. \return Whether the VLR was added.

/// Add a Well-known Text VLR associated with the spatial reference.
/// \return  Whether the VLR was added.
bool LasWriter::addWktVlr()
{
    // WKT2 and PROJJSON can be writen in PDAL VLRs
    if (d->opts.enhancedSrsVlrs) {
        const std::string wkt2 = m_srs.getWKT2();
        if (!wkt2.empty()) {
            std::vector<char> wktBytes(wkt2.begin(), wkt2.end());
            wktBytes.resize(wktBytes.size() + 1, 0);
            addVlr(las::TransformUserId, las::LASFWkt2recordId, "PDAL WKT2 Record", wktBytes);
        }

        const std::string projjson = m_srs.getPROJJSON();
        if (!projjson.empty()) {
            std::vector<char> wktBytes(projjson.begin(), projjson.end());
            wktBytes.resize(wktBytes.size() + 1, 0);
            addVlr(las::PdalUserId, las::PdalProjJsonRecordId, "PDAL PROJJSON Record", wktBytes);
        }
    }

    // LAS 1.4 requires WKTv1
    std::string wkt;
    try
    {
        wkt = m_srs.getWKT1();
    }
    catch(const std::exception&)
    {
        if (!d->opts.enhancedSrsVlrs)
            throw;
    }

    if (wkt.empty())
        return false;

    std::vector<char> wktBytes(wkt.begin(), wkt.end());
    // This tacks a NULL to the end of the data, which is required by the spec.
    wktBytes.resize(wktBytes.size() + 1, 0);
    addVlr(las::TransformUserId, las::WktRecordId, "OGC Transformation Record", wktBytes);

    // The data in the vector gets moved to the VLR, so we have to recreate it.
    std::vector<char> wktBytes2(wkt.begin(), wkt.end());
    wktBytes2.resize(wktBytes2.size() + 1, 0);
    addVlr(las::LiblasUserId, las::WktRecordId, "OGR variant of OpenGIS WKT SRS", wktBytes2);
    return true;
}


void LasWriter::addExtraBytesVlr()