Subject: Re: What should be in the EXPOSURE map ? Hello Stephane and Niels, > > Actually, mosaic_spec does not use the exposure extension. Just a precision: mosaic_spec does not use the exposure for some calculation, but it does read the exposure map. If the exposure extension does not exist, one gets the following warning from mosaic_spec: Warn_1 2008-01-28T08:08:29 mosaic_spec 1.7: No image with ( IMATYPE == 'EXPOSURE' )&& NEAR( E_MIN , 3.040000 ,0.100000 ) If the exposure extension does exist, then one gets the exposure value at the given coordinates, for example: Log_0 2008-01-28T08:09:08 mosaic_spec 1.7: xmax = 238, ymax = 62, exposure = 937 sec Cheers, Jérôme -- Dr. Jérôme CHENEVEZ Institut for rumforskning og -teknologi DTU Space Juliane Maries Vej 30 National Space Institute DK-2100 Copenhagen Ø http://www.dsri.dk/~jerome www.space.dtu.dk Tel. +45 35 32 57 03 FAX: +45 35 36 24 75