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  Crime maps for Web GIS The Web GIS I decided to use for this assignment is a community crime tracker, also publicly known as a community crime map. The purpose of this Web GIS application is to provide citizens, government officials, and public safety personnel knowledge of where crimes are occurring, as well as the dates and times of the incidents. This type of analysis provides crime intelligence for spatial, temporal, and density information. It tells the public where crimes are occurring, when they are occurring, and what crimes are occurring. This is useful to all people who utilize the web map tool. It identifies safe areas to live, areas to avoid when going out at night, and it provides a general understanding of where public safety needs to patrol to deter crime from occurring. I would say that the main audience for this Web GIS tool is a citizen, as public safety tends to have more advanced spatial GIS analysis for Hot spot mapping and crime density. This tool is mainly ...
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Proportional Symbols and Bivariate Choropleth Maps

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  Proportional Symbol Mapping in GIS In todays article, we are going to talk about two types maps. Proportional and Bivariate Choropleth maps. One is used to display data that is proportional to a clustering radius of location. For example, a proportional map can be used for population ort even crime data per city. The bigger the circle on the map, the more data exists at that location. therefore, the bigger the circle, the more data that is being represented. It also shows which areas have a small amount of data, thus representing a small circle.  https://www.axismaps.com/guide/proportional-symbols Map of India displaying population counts in each city: Map Legend I first wanted to focus on making my population proportional circles legible on my legend. To do this, I converted my legend with multiple circles into a graphic. I then moved the circles on top of each other, putting the circles smallest to largest oriented to the bottom of the legend expanding outward. Each circle...
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Infographics In GIS

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 Bringing Data To Life The art of data science, statistics, business intelligence, and GIS... Today is going to be a fun article on infographics. Please reference the graphic below... In this graphic I needed to tell a story. I am conveying to my map reader that insufficient sleep and mental distress are very much related to each other. In the scientific words, these two variables have a high positive correlation. The maps above are demonstrating the percentages of insufficient sleep percentage per county and the mental distress percentage per county. Both of these variable are normalized, as they are calculated percentages using population data of each county in the state of  Georgia and affected people in each country for the corresponding variable.  Positive Correlation In a scatter plot, we can compare two variables. If the line is a linear progression running from SW to NE, then you have a positive correlation. this means that the two datasets you are working with ar...
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Colors: Bringing Maps to Life

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 Choropleth Mapping using Colors in GIS Basics In Color In GIS, we use colors to display point, polygon,  vector, and raster data in a way in which the user can understand the map. Colors help identify terrain, natural vegetation, or even icons of interest on a map. Today we are going to talk about how a GIS user can manipulate colors to display Choropleth maps regarding population changes, land use, and unique color ramps.  Working with RGB and HSV Colors Tha image above shows RGB values and HSV values. These values are how the GIS user selects the hue and saturation of values to derive meaningful symbology to data on a map. As you can see, by changing these values we can alter colors such as keeping the hue (red for example) but altering the saturation of light to create shades of light red and dark red. By changing the hue into a divergent color ramp, we can have symbology that uses multiple colors and shades from light to dark. Working with the hue and saturation in h...
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Elevation Mapping in 3D

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Today we are talking about 3D mapping! In GIS, we can use Digital Elevation Models (DEM's) to map terrains across the world in 3D. These DEM's are elevation raster's that contain the elevation data for terrain mapping in order to display mountains, cliffs, ridges, flat land, and even bodies of water.  Contours are how we label these changes in elevation on a map using lines and labels. Below is an example of a terrain located on a map. The colored symbology displays the areas of elevation, depicting high elevation as red and white, and low elevation as blue to green. The contour labels are the text labels located on the lines of elevation in 100 Meter intervals.  I chose the contour placement for my labels using a white halo around the text. I also used the checkbox for placing the labels in ladders as centered straight alignment on my map. This allows the labels to run along with the contour lines as they are drawn. I used the page label alignment as well for the contour p...
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