The directory structure and naming conventions may vary. Examples produced by various agencies are as follows. In each case, you would select the imagery file.
A) Spot Image CD-ROMs typically have a directory structure as follows:
/cdrom/SCENE01/VOLD_01.DAT /cdrom/SCENE01/LEAD_01.DAT /cdrom/SCENE01/IMAG_01.DAT <--- Select this file /cdrom/SCENE01/TRAI_01.DAT /cdrom/SCENE01/NULL_01.DAT ...B) ESA CD-ROMs may have the following structure. The following example is organized in a BSQ (Band Sequential) format for one scene. Each band of the scene is in a separate file, so you would select and then display the imagery, for as many bands as you want.
... /cdrom/scene1/lea_01.001 /cdrom/scene1/dat_01.001 <--- Select this file and load imagery /cdrom/scene1/tra_01.001 /cdrom/scene1/lea_02.001 /cdrom/scene1/dat_02.001 <--- Select this file and load imagery /cdrom/scene1/tra_02.001 ...C) RADARSAT CD-ROMs may have the following structure:
/cdrom/lgsowg/vold_01.dat /cdrom/lgsowg/lead_01.dat /cdrom/lgsowg/imag_01.dat <--- Select this file /cdrom/lgsowg/trai_01.dat /cdrom/lgsowg/null_01.datD) CCRS CD-ROMs may have the following structure:
/cdrom/me0072/me0072.vol /cdrom/me0072/me0072.ldr /cdrom/me0072/me0072.img <--- Select this file /cdrom/me0072/me0072.trl /cdrom/me0072/me0072.nulCurrently, none of the header or trailer files are utilized. Only reading and updating of the image data is supported. It is not possible to create these files, nor is there any auxiliary information.
Note: Writing is only supported if the dataset is copied to disk from the CDROM.
LGSOWG magnetic tapes can be read with the PACE program MIL, while LGSOWG CD-ROMs can be accessed via the PACE program LINK.
See Also: MIL, LINK, FIMPORT, MSAR, CDSAR, MLANDC, CDLANDB, CDLANDC, MSPOT, CDSPOT, MSPOTC, CDSPOTC