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format from a single Landsat image or a strip mosaic to a quadrangle 
or State mosaic (Colvocoresses 1975a, Pilonero 1973). McEwen and 
Schoonmaker (1974), describe innovative techniques, including film 
mosaicking, which were utilized in the production of a 1:500,000-scale 
gridded color image map of Florida and which resulted in improved 
geometric accuracy and resolution of the printed map.  Landsat gridded 
image maps at 1:500,000 scale were also published for Arizona, New 
Jersey, and the Upper Chesapeake Bay area. Prototype image maps of 
Antarctica at scales from 1:250,000 to 1:1,000,000 have also been 
produced from Landsat imagery and have been useful in identifying 
and locating such features as glaciers, coast lines, island and 
other geographic features. Significant movement and other changes 
associated with such features have also been noted on successive 
images (MacDonald 1973, Southard and MacDonald 1974). 
Experiments carried out by the USGS and others have shown that 
Landsat images are useful for delineating areas in need of revision 
on large- and small-scale maps and for revision of selected features 
such as water bodies on small-scale maps. The National Oceanographic 
and Atmospheric Administration has utilized Landsat images successfully 
to revise the water features on a 1:500,000 scale sectional aeronautical 
chart. The Defense Mapping Agency Aerospace Center is investigating 
Landsat applications to aeronautical chart revision at 1:250,000 and 
smaller scales. The utility of Landsat imagery for nautical charting 
is still under study but experiments carried out to date have shown 
definite promise through the water penetration capabilities of MSS 
bands 4 and 5. Polcyn (1976), reports that under optimum conditions, 
and with auxiliary data, shallow sea bottoms may be mapped to a depth 
of 22 m with accuracies within 10 percent of measured values (rms). 
Since Landsat data are originally recorded on digital tapes, wide 
variety of radiometric enhancement and geometric transformations can 
be performed before the image is printed. From the launch of Landsat-1 
through mid-1974, NASA produced precision processed images on the UTM 
projection. Mikhail and Baker (1973), have reported on the Landsat 
transformation problem in some detail. During 1975, four organizations 
working under NASA contracts prepared reports relating to this problem 
(Goetz and Blackwell 1975, Rifman 1975, Bernstein 1975, and Derouchie 
1975). Eliason et al. (1975), described digital techniques for 
producing true color images from Landsat tapes.  Batson et al. (1975). 
demonstrated a technique which correlates digital terrain data with 
Landsat data to produce a stereopair which gives a spectacular 
presentation of relief. This technique could also be applied to 
eliminate relief displacement from the original Landsat imagery if a 
digital model of the Earth's topography were available. 
Specifications for a third Landsat made by NASA during 1975 include 
two visible band RBV cameras of 254 mm focal length to provide twice