Sunday, August 3, 2008

KML remote sensing


Using Google Earth and teh 2007 weather satelite kml files, I pulled up an image of exactly where my home should be. Unfortunately the information is not up to date so nothing but a large field exists here. This is an example of aerial photography.

Classed Choropleth Map

A classed choropleth map has a legend with different equal intervals for ranges of the classes of data to be classified. The image above is of death rates for infants a year and under based on province in Australia.

Univariate choropleth maps

A Univariate choropleth map as above only shows information regarding one variable. In this map, the variable is population density for the New England Areas. The darker colors tend to be populated metropolitan areas.

Standardized Choropleth Map



This is a standardized choropleth map. As other chloropleth maps it is catogorized by a spatial boundary and it sorts the population by a percentage. In this map it shows the percentage of the Canadian Population age 14 and younger.

Bivariate choropleth maps


The above image is a bivariate choropleth map. A Bivariate map shows two different types of variables. This map above shows distance from the Mississippi River and number of confirmed cases of West Nile Virus.

Range graded proportional circle map

A Range graded proportional circle map is much like a chloropeth map except that instead of dots, we have a larger circle to show the larger proportion of the variable over a geographic area. In this map, we have census information for Canada.

DOQQ


DOQQ or Digital Orthophoto Quarter Quadrangle iimages are GIS images of aerial photos scanned into a computer with seams and angle displacements corrected. A DOQQ is a one meter pixel resolution that covers areas measuring 3.75-minutes longitude and latitude at a 1:12,000 scale. The above DOQQ is of Washington, D.C.