RECORD_TYPE = STREAM PRODUCT_CREATION_TIME = 1999-03-01 OBJECT = TEXT NOTE = "Anomalies and discrepancies in the CD Volume set" END_OBJECT = TEXT END There are no values for the final label column (SOURCE_IMAGE_ID) in IMGINDEX.TAB or the 20 items contained within the column. The source image list was not available for the Mars High Resolution MDIM products. The column has been included only for consistency with previously released volumes. NASAView does not correctly display ITEMS within COLUMNS in the included text files IMGINDEX.TAB and INGINDEX.LAB. Image Data Density Range (Volumes VO_2015 through VO_2022 only) --------------------------------------------------------------- Users should be aware that in many cases the density range is not optimal for the image data provided on this high resolution CD volume set. Systematic image processing procedures, original data quality, and image filter algorithms have resulted in the image data range being quantized. That is, the overall image density range is relatively low and intermediate density variations may have been 'binned' into single density values. The visual effect of this quantization is the appearance of density contours within the images. Future processing of Viking high resolution products may address and, where possible, correct these problems.