Monday, October 22, 2012

Speed Limits in Georgetown, Texas

The map above shows the various speed limits throughout Georgetown. If you look closely at the map you will see that the color most visible is a red orange, which is equal to 30 mph. There are over three thousand roads that have a speed limit of 30 mph.

This map was influenced by the maps from a website called, that has the entire world mapped and most major streets and what their speed limits are.

Wednesday, October 10, 2012

Most Dangerous Areas for Assault in Georgetown

I thought it would be interesting to see if there are any parts of town in Georgetown that are more dangerous than others. I chose to look specifically at the number and location of assaults in the past year from January 1, 2012 til now.

The Georgetown PD website had a link to a website ( that mapped out the locations for various types of police reports. I looked specifically at the "violent" category and took only the data for assaults. There were a total of 126 assaults. I had to do some manipulation in excel to make it ready for ArcMap, but once I did that, it was easy to geocode the addresses provided for the assaults.

After geocoding, I changed the symbology of the data to show graduated symbols based on the number of police car responders. In ranking the severity of the assaults, I assumed that the number of police cars at the scene correlated to the relative severity of the incident. There definitely appears to be some clustering of assaults, especially with more severe assault incidents.

Georgetown Recreation Trails Map

This map includes four main trail located in Georgetown TX. The four bird watching icons on the map represent 4 different hot spots where a wealth of different bird species have been spotted. The data for the species found around Georgetown was gathered from Ebird is an online organization that provides a checklist that allows for the birding community to report and access information about birds. The number of species of birds found in the Ebird Range and Point Maps is dependent on the number of reports. On the map, the four icons represent a different hotspot. We selected four hotspots that are found on the four main trails for trail user and birder convenience. Below we have listed the types of bird species found in each hotspot between the years 2010 and 2012.

Hotspot #1 – Lake Georgetown Loop (red)
Location: Lake Georgetown- Russell Park, Williamson County, Texas, US
Date of Effort: May 27, 2012 11:00 AM
Species: 23 total
4 Wild Turkey
1 Neotropic Cormorant
2 Black Vulture
4 Turkey Vulture
2 Mourning Dove
3 Yellow-billed Cuckoo
2 Ladder-backed Woodpecker
1 Eastern Wood Pewee
1 Yellow-bellied Flycatcher
6 Scissor-tailed Flycatcher
3 White-eyed Vireo
4 Carolina Chickadee
8 Black-crested Titmouse
12 Bewick’s Wren
2 Carolina Wren
4 Northern Mockingbird
4 Golden-cheeked Warbler
2 Summer Tanager
6 Northern Cardinal
3 Blue Grosbeak
4 Painted Bunting
6 Red-winged Blackbird
2 Lesser Goldfinch

Hotspot #2 – San Gabriel Park Loop (pink)
Georgetown – San Gabriel Park, Williamson County, TX, US
Date of Effort: August 31, 2012 7:00 AM
Species: 14 (+2 other taxa) total
20 goose sp.
3 Egyptian Goose
10 Mallard duck (domestic)
1 Great Egret
1 Red-Shouldered Hawk
10 White-winged Dove
2 Northern Flicker
2 Eastern Phoebe
2 Blue Jay
3 Carolina Chickadee
1 Northern Mockingbird
5 European Starling
1 Common Yellowthroat
2 Northern Cardinal
1 Baltimore Oriole
2 Lesser Goldfinch

Hotspot #3 – Airport Way Trails (blue)
Georgetown-Berry Springs Park, Williamson County, TX, US
Date of Effort:  October 18, 2010
Species: 20 total
White-winged Dove
2 Great Horned Owl
1 Barred Owl
1 Red bellied Woodpecker
1 Ladder-backed Woodpecker
1 Downy Woodpecker
American Crow
Carolina Chickadee
Black-crested Titmouse
1 Golden-crowned Kinglet
Ruby-crowned Kinglet
2 Eastern Bluebird
1 Northern Mockingbird
European Starling
American Pipit
Yellow-rumped Warbler
1 Vesper Sparrow
Great-tailed Grackle
House Sparrow

Hotspot #4 – Golden Years Gold Trail (purple)
Sun-City-Legacy Hills Park, Williamson County, Texas, US
Date of Effort: July, 18 2012
Species: 21 Total
4 Mallard (duck)
2 Green Heron
1 Yellow-crowned Night-Heron
12 Black Vulture
1 Killdeer
1 Mourning Dove
1 Yellow-billed Cuckoo
1 Belted Kingfisher
1 Red-bellied Woodpecker
1 Eastern Phoebe
1 Great Crested Flycatcher
1 Scissor-tailed Flycatcher
2 Blue Jay
1 Carolina Chickadee
1 Bewick’s Wren
1 American Robin
25 Northern Mockingbird
1 Summer Tanager
2 Northern Cardinal
2 Lesser Goldfinch

Vegetation in Georgetown

I wanted to make these maps because I wanted to know what types of vegetation are found in Georgetown, Texas and get a sense of what sort of ecosystem we have built this city in. While driving to the movies, Walmart, or HEB I see large groups of deer and occasionally a raccoon or two walking in the parking lot or road, I wanted to get a feel of where in Georgetown there was still open ground for wild animals such as these. The first map shows where different types of vegetation are found. The second map shows where in Georgetown you can find open space such as parks where development hasn't completely taken over vegetation. Much of the forest and grassland area has been enveloped in development, this map gives a since of nostalgia of what use to and could be. To make this map I got data of where parks and open space is, city blocks are, rivers and streams are, lakes are, and different types of vegetation is, from The map shows that the most open space that is not personal property is found in West Georgetown surrounding Georgetown lake, with a few enclaves around downtown.

Religious Proximity of Georgetown

This is a depiction of the distances between all of the "religious" addresses which are within Georgetown typical boundaries. The cross symbols represent a religious structure, which is differentiated from a church or religious place of worship by Wilco, and their distance relative to one another is represented by the red-blue spectrum. There is clustering near the center of Georgetown while there are few religious structures near the rural, outskirts of the city. This type of geographic pattern most likely correlates with the city's population density as well as its most traffic-heavy roads. Some possible biases that may be present in this map include the city's boundaries (which could be limiting the number of addresses near the boundaries) and the ambiguous word "religion" used to geocode these addresses that were contained within the shapefile.

Data retrieved from:

Lake Georgetown

Lake Georgetown is a typical highland type reservoir with steeply sloping banks covered with limestone rock. Because of water fluctuations aquatic vegetation has a hard time establishing itself. A moderate amount of standing timber can be found in the backs of coves and along some shoreline areas, but most cover/structure is in the form of rock ledges and boulders. In response to the lack of natural vegetation, cedar-tree fish attractors have been added to provide additional structure. They were placed by TPWD in cooperation with the Army Corps of Engineers and the Sun City Hunting and Fishing Club. Most attractors are placed on key structure spots including drop-offs, humps and roadbeds. Black bass, crappie and sunfish use the attractors for cover. Fishermen may use GPS in conjunction with a fish finder to locate these structures.
                Lake Georgetown has three boat ramps, all of which are located near the fish attractors.

Courtesy Docs
Picnic Area
Cedar Breaks Park
Jim Hogg Park
Russell Park


This Data was collected from the TPWD website, and the Wilson County website
Links for more information:

GTography: Georgetown Bike Trails

Because I made a map in a previous lab depicting the "Top 10 Biker Friendly Cities" in the U.S., I figured a local portrayal of bike routes in Georgetown would compliment the national version nicely. The data was collected from the Williamson County Maps and GIS website ( ), then extracted and exported into ArcMaps. Exported data included the open/park areas, trails, and roads, and the block census of Williamson County. I then selected the Georgetown area, then parks and open areas specifically with the data provided, to hone in on the area of most importance (that of which encompassed the bike trails in closest proximity to Georgetown). This map indicates designated trails outlined in red and named by the corresponding areas they encompass/bisect. With this map, bikers can take advantage of the trails offered in the city, while also mapping out their own routes and finding connecting roads to each of the trails.

Fun with Veggies in Williamson County

Looking to try your hand at a green-thumb or add flavor to your culinary experiences with some fresh-from-the-backyard vegetables? As it turns out, Georgetown has the capacity to provide you with a plentiful supply of toil-ready soil and vegetation for farming and horticulture. Despite the arid, hot, humid, and generally miserable summers, Georgetown soils are classified by the NRCS soil classification system as generally being 'suitable for farming' with the addition of some water. So, it's time to throw down some peat moss and plant those seeds, because now there is no excuse to get your hands a little dirty!
According to the map, the county has done an excellent job utilizing the best soil for crops, but Georgetown, in particular, has abundant loamy soil despite being nearest in proximity to urban covered land. It is an oasis in a sea of barren soil and dry grass lands that have taken over the surrounding county. Midst the long-hanging, allergy-inducing oak forests, you could farm in your own backyard. Even Southwestern University has their own community garden and participates in the Georgetown Farmers Market, which gathers fellow fruit fanatics from across town to the areas around Williams Road. With just a dash of water, a myriad of vegetables and herbs could be at your finger tips.

Monday, October 8, 2012

What is a Food Desert?

This article discusses the correlation between the locations of grocery stores with healthy food, compared to the locations of non-grocery stores that sell unhealthy food and how close they are to resident’s homes. Unhealthy eating habits have been at an increase since people started realizing how “fat” Americans were becoming and the up rise in childhood diabetes. When research was conducted on the small town of Lawrence, Kansas, it was found that there are many cities in the U.S where there are no grocery stores within a 5 mile radius of people’s homes. These places are considered to be a “food desert’s” [which] is the name established for specific locations with “poor access to affordable, healthful food” (1210). There are stores such as gas stations or food outlets in these areas, but the food offered is not of significant nutritional value.

  Other factors that were considered in this study were the modes of transportation used to get from the people’s homes to the food source location. Divided into four groups were people who walked, people who took public transportation, people who were driven and people who drove themselves. The conclusion the scientists came to when factoring in modes of transportation was that the “extent of the food desert is very different for people who travel on foot, by public transportation, and by private automobile as is the scale and time of their journey”(1215).  And depending on the type of transportation used there were limiting factors: if you were walking you can only carry so many bags of groceries, if you rode the bus you were also limited by the amount of groceries you could take, if you had a ride you were limited by the amount of time the person had available to take you to the store and what you were able to get, and if you had your own car you had to pay for gas meaning less money for food.

Specifically for this study “a cost model was created to calculate the cost variation between the distance from the stores, the mode of transportation, and income” (1212). Using the data calculated by this cost model, the researchers were able to conclude that there are many factors that limit how close healthful food is to a particular area. Factors such as income level, the amount of people that own vehicles, and location of the city all contribute to the lack of healthy food.

Works Cited

Lucious F. Hallett IV, D. M. (2010). Qantifying the Extent and Cost of Food Deserts in Lawrence, Kansas, USA. Applied Geography, 1210-1216.