Validate that a VRT represents a simple mosaic

Source: R/validate_vrt.R

Checks whether a VRT file is suitable for conversion to a GTI tile index. A "simple" VRT mosaic must satisfy:

validate_vrt(vrt_info)

Arguments

vrt_info

A list as returned by parse_vrt().

Value

Invisibly, TRUE if valid. Throws an error with a diagnostic message if validation fails.

Details

  • All sources are SimpleSource or ComplexSource (no AveragedSource, KernelFilteredSource, etc.)

  • No subClass on bands (no VRTWarpedDataset, VRTDerivedRasterBand)

  • All bands reference the same set of source files with the same DstRect layout (standard multi-band mosaic)

  • SrcRect and DstRect dimensions match (no within-VRT resampling)

Examples

if (FALSE) { # \dontrun{
info <- parse_vrt("mosaic.vrt")
validate_vrt(info)
} # }