“Reading” GIS Imagery Houston, Texas

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Presentation transcript:

“Reading” GIS Imagery Houston, Texas Square, checkerboard or quilt pattern usually indicate agriculture (different greens equal different types of crops) Rivers, streams, and bayous appear as wavy lines (irregular, wavy=nature). If image has color, water is usually, but not always, colored blue or dark grey. Lighter shades typically indicate sparse vegetation or more shallow water (may also show soil erosion in water) Darker shades typically indicate thicker vegetation or deeper water texasbest.com houstontomorrow.org Brown, light tan is usually an indication of soil exposure (as in clearing for development, planting or natural settings such as deserts and beaches) Light grey = populations, development, urbanization (straight lines = infrastructure, man made)

Drag labels to show the corresponding feature on the GIS image Bush Intercontinental Airport Galveston Bay Sam Houston Toll way/Beltway Bear Creek Park and Flood Plain

Drag labels to show the corresponding feature on the GIS image http://www.wpmap.org/physical-map-of-africa/ Drag labels to show the corresponding feature on the GIS image Mt. Kilimanjaro volcano Lake Victoria water Great Rift Valley elevation change Nile River water Sahara desert Strait of Hormuz chokepoint Congo Basin vegetation

Warning: The colors used in GIS changes. Shading (dark to light) is more consistent. GIS images are often shaded to show details. In the image to the right, green vegetation is colored red. The Greater Houston Metropolitan area is seen, with urban areas blue- grey and suburban areas white-pink. Houston city is at center. Bush International airport is at top center visible with white runways. North Freeway is the white motorway running from the city north. At top right is Lake Houston with its dam wall; the navigable Buffalo Bayou runs from the city to the north tip of Galveston Bay (at right). 2ols.com Summer Winter

Can you match the label to the correct image? Hawaii Nile River California Mediterranean Sea Andes Mountains Great Salt Lake Rocky Mountains Volcano Sahara Spain Italy