Figure 3.6

Figure 3.6
Comparison of urban land parcel sizes and IFOVs of satellite remote sensors with pixel sizes for the analysis of digitized photographs (1200 ppi) from low Earth orbit in this study. Urban parcel size represents the estimated size of a parcel of land that would indicate a single land-use class (Welch, 1982). Smaller pixel sizes then those observed in this study could be obtained by digitizing at higher resolution. For reference, the minimum ground resolved distance observed from the best astronaut photographs is also shown. (Modified from Welch, 1982: Fig. 4; also reproduced in Jensen, 1983: Fig. 30-32.)

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