Black and white aerial photos are mostly used for reference or personal purposes. They are not able to pick up heat signals like their infrared counterparts, and therefore are not as effective in monitoring the environment, other than structural changes over time perhaps. This map shows an aerial photograph of a large city and is also hypsometric.http://www.google.com/imgres?imgurl=http://www.fas.org/irp/imint/docs/rst/Sect21/BloomAerial4.JPG&imgrefurl=http://www.fas.org/irp/imint/docs/rst/Sect21/examq21.html&h=427&w=400&sz=110&tbnid=SIC6CvJnBukHBM:&tbnh=232&tbnw=218&prev=/images%3Fq%3Dblack%2Band%2Bwhite%2Baerial%2Bphoto&hl=en&usg=__PWsXBH096fxMB75a5Gr1rQ9xRbU=&ei=gjfSS6yJOojc9ATSvdGrDw&sa=X&oi=image_result&resnum=3&ct=image&ved=0CAoQ9QEwAg
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