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gdal_template.h
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gdal_template.h
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/*
* Copyright 2019 Kai Pastor
*
* This file is part of OpenOrienteering.
*
* OpenOrienteering is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* OpenOrienteering is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with OpenOrienteering. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef OPENORIENTEERING_GDAL_TEMPLATE_H
#define OPENORIENTEERING_GDAL_TEMPLATE_H
#include <array>
#include <QByteArray>
#include <QString>
#include <QTransform>
using GDALDatasetH = void*;
namespace OpenOrienteering {
/**
* Support for geospatial raster data.
*/
class GdalTemplate
{
public:
/**
* Raster data georeferencing information
*/
struct RasterGeoreferencing
{
QByteArray driver; ///< @see GDALGetDriverShortName()
QByteArray spec; ///< @see GDALGetProjectionRef()
std::array<double, 6> geo_transform = {{ 0, 1, 0, 0, 0, 1 }}; ///< @see GDALGetGeoTransform()
bool valid = false;
/**
* Returns RasterGeoreferencing for the data in the given dataset.
*/
static RasterGeoreferencing fromGDALDataset(GDALDatasetH dataset);
/**
* Returns a pixel-to-world transformation from GDAL's geo_transform.
*/
operator QTransform() const;
/**
* Return the given CRS specification converted to PROJ format, if possible.
*
* @see OSRExportToProj4()
*/
static QByteArray toProjSpec(const QByteArray& gdal_spec);
};
/**
* Returns raster georeferencing for the given file.
*
* In case of errors, the data's `valid` member is set to false.
*/
static RasterGeoreferencing tryReadProjection(const QString& filepath);
};
} // namespace OpenOrienteering
#endif // OPENORIENTEERING_GDAL_TEMPLATE_H