Get espg from tif data #61
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Ryanf55
reviewed
Mar 30, 2024
| std::cout << std::endl << "Wkt ProjectionRef: " << pszProjection << std::endl; | ||
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| const OGRSpatialReference *spatial_ref = dataset->GetSpatialRef(); | ||
| std::string name_coordinate = spatial_ref->GetAttrValue("geogcs"); |
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Note - GetSpacialRef can return null, so the code would segfault from a nullptr dereference if the user supplied the path to a dataset that didn't have one.
https://gdal.org/doxygen/classGDALDataset.html#a9bd7f8b54ff4c12756976c7a0116d49a
Ryanf55
reviewed
Mar 30, 2024
| double mapcenter_e = originX + pixelSizeX * width * 0.5; | ||
| double mapcenter_n = originY + pixelSizeY * height * 0.5; | ||
| maporigin_.espg = ESPG::CH1903_LV03; | ||
| maporigin_.espg = static_cast<ESPG>(std::stoi(epsg_code)); |
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FYI, std::stoi could throw if the OGRSpatialReference doesn't have the AUTHORITY attribute because it will return null. You might want to wrap it in try-catch, or return early if the epsg_code == nullptr
Ryanf55
approved these changes
Mar 30, 2024
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Problem Description
The ESPG code was hardcoded before. This PR acquires the code from the tif file directly