Digital Orthophoto Quarter Quadrangle

The digital orthophoto quarter quadrangle is a Ais a computer-generated image of an aerial photograph in which image displacement caused by terrain relief and camera tilts has been removed. Here is a DOQQ example from geospectra

http://www.geospectra.net/kite/kahola/k_map0.jpg

DEM

A digital elevation model is a digital representation of the ground's topography. In this example of Barbados you see the different levels of elevation represented by various colors.

http://www.earth.columbia.edu/news/2005/images/4_Barbados_DEM_300.jpg

DLG

Digital line graphs are digital vector data that reprosent cartographic information. Here is an example of a digital line graph of the South Western part of the U.S.

www.versamap.com/UsgsDlg_CaNvAzUt.png

DRG

A digital raster graphic is basically an scanned image of a USGS topographic map. In this example of a DRG map of Alaska. Notice the topography defined in the visualization of the mountains photographed in Alaska

erg.usgs.gov/.../fs10602.graphics/alaska.jpg

Isopleth

Isopleths are items of meterological charts that connects points that share an equal value of some variable. In this example, the map of the temperatures in the United States. You can see the various lines circling the areas with the same temperatures.

https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgbT8EKj-TbCCZeWVSpD2VnnGO9a5Jy_ut7Nx3sJDGl3_V4DXazQL3Wx90UynBnpW40jRXmmCyVFriIyuj_StjrPVt8nZ0Qz_rJfPYeFI2w6mdN7W08ZMUN4jc4s3NafS7Edvy4EAzqcag/s320/isopleths.bmp

Isohyet

An isohyet is a line on a map or even a chart that connects areas with equal rainfall. In this example we have a map of Hong Kong with isohyets being represented as blue lines

www.hko.gov.hk/.../images/figure/figure332.gif

Isotachs

Isotachs are lines on a given surface connecting points with equal wind speed. Included is an example of isotachs of the United States depicted in shades of purple with the higher speeds

wxmaps.org/pix/avnmr5.00hr.png

Isobars

An isobar is a contour line of equal or constant pressure in meteorology. Here is an example of an isobar in the country of Germany . Notice the different pressure signified by the different color lines.

z.about.com/d/german/1/0/1/J/aWetteurfronts.jpg

LIDAR

Lidar stands for Light Detection and Ranging. LIDAR is an optical remote sensing technology. Lidar measures properties of scattered light to find range of a target. Above is an Austrailian LIDAR. www.aad.gov.au/.../twia_lidar_beam_lge.jpg

Doppler radar

The doppler radar is a form of radar of using the doppler effect, by which the returned echoes from targets to measure radar velocity. The example above is of a Doppler in Melbourne

mirror.bom.gov.au/.../melb_doppler_radar.jpg

Black and white aerial photo

Here is an example of a black and white aerial photo of a city in California. The photos are shot from a plane.

online.redwoods.edu/.../BTShusteraerialview2.jpg

Infrared photos

Infrared photos can be used to show changes in the environment, forestry, wetlands, and the oceans. Included in this example is a infrared photo of a forest

http://www.flickr.com/photos/gh0st/194924688/

Cartographic Animation

Cartographic animation is a visualization technique that displays dynamic geographical phenomena through its ability to show interrelations amongst geospatial data's components, location, attribute and time. Here is an example of a cartographic animated data of Nebraska and cancer related deaths

maps.unomaha.edu/.../JavaScript/Cancer1.gif

Statistical Maps

Statistical Maps are used to demonstrate the distribution of a variable over a geographic area. The example included is a map of the distribution of corn by acres in the United States

http://cache.eb.com/eb/image?id=64892&rendTypeId=4

Cartograms

A cartogram is a map it is abstracted to where base of which is not true to scale. In this included example is the map of threatened and endangered species percentages by country. Notice the various sizes of the continents are distorted. http://www.amphibiaweb.org/amphibian/cartograms/cart_threatenedpercentage.jpg

Flow Maps

Flow maps are used to show the movement of objects from one location to another. This movement could include the number of people that are migrating, the amount of goods and services traded, etc. This example includes a telecommunications flow map.

Isoline maps

An isoline map is a map that has continuous lines joining points of the same value. Some examples of isoline would be equal altitude temperature ,barometric pressure, wind speed and wind direction. This example is of China and notice here the different lines (dashed or straight) connecting different parts of the country

http://www.unu.edu/unupress/unupbooks/80157e/80157E0W.GIF

Proportional Circle Map

A proportional circle map scales circle area to the value that is ususally a total for a geographic area on a map. This map can be an an alternative to the choropleth map. This image is a proportional circle map of Germany and the major industries

www.lib.utexas.edu/.../west_germany_ind_1972.jpg