Zach VernonGIS/RS Research AssociateHouston Advanced Research Centerzvernon@harc.edu

Introduction to ArcExplorer ArcExplorer for Education and ArcExplorer Online

Adding Web Map Services to ArcExplorer

Adding spatial data to ArcExplorer Discussion of exercise datasets Investigating and Symbolizing data in ArcExplorer

Selecting and Buffering data in ArcExplorer

Distance calculations in ArcExplorer

Freely available, lightweight GIS data viewer

Basic GIS functions available (buffer, query, measure)

Connect to Internet map servers Display and query standard ESRI data Sources

Shapefiles ArcInfo Coverages Images ArcIMS Services

Interact with both spatial and attribute data

Symbolize data and create thematic maps Perform basic spatial analysis Create maps AND projects that can be shared with colleagues

ArcExplorer for Education, which many of you have installed, is an expanded version of the ArcExplorer software Supported on Mac Displays MrSid (a common compressed image format) Displays CAD data Can Create Projections (the mathematical transformations used to get 3D data to a 2D surface)

Create data layers from table of x,y coordinates

User Community with lesson plans and data: http://edcommunity.esri.com/software/aejee/ Political Geography lesson centered around 2008 election

Science lesson centered around N.A. Hurricane Data History lesson based on Lewis and Clark routing data

ArcGIS Explorer More CPU-intensive, but more powerful free GIS Data Viewer from ESRI

Supports a wider variety of datasets (geodatabases, KML/KMZ, and layer packages)

Supports ArcGIS Server web mapping services, in addition to ArcIMS

Integrate a wider variety of content, including geotagged photos and videos

Supports 3D rendering, very similar to GE when in that mode

Built-in basemaps and large library of user data

1. Start ArcExplorer2. Click the Add Data button3. Under “WWW,” select “Add Web Site”4. Type in http://geodata.epa.gov5. Select “AFS_FS” and add County

Boundaries and Air Emissions to add to map. These are the US EPA Regulated Air Emissions Facilities.

6. Zoom to Houston Region using the “magnifying glass” tool

1. Click the Add Data button

2. Browse to where the exercise data is stored

3. Add each layer by double clicking on it

Benzene, from: http://emergency.cdc.gov/agent/benzene/basics/facts.asp

Where it is found and used

“Benzene is formed from both natural processes and human activities.”

“Natural sources of benzene include volcanoes and forest fires. Benzene is also a natural part of crude oil, gasoline, and cigarette smoke.”

“Benzene is widely used in the United States . It ranks in the top 20 chemicals for production volume.”

“Some industries use benzene to make other chemicals that are used to make plastics, resins, and nylon and synthetic fibers. Benzene is also used to make some types of lubricants, rubbers, dyes, detergents, drugs, and pesticides.”

Long-term Health effects “The major effect of benzene from long-term exposure is on the blood. (Long-term exposure means exposure of a year or more.) Benzene causes harmful effects on the bone marrow and can cause a decrease in red blood cells, leading to anemia. It can also cause excessive bleeding and can affect the immune system, increasing the chance for infection.”

“Some women who breathed high levels of benzene for many months had irregular menstrual periods and a decrease in the size of their ovaries. It is not known whether benzene exposure affects the developing fetus in pregnant women or fertility in men.”

“Animal studies have shown low birth weights, delayed bone formation, and bone marrow damage when pregnant animals breathed benzene.”

“The Department of Health and Human Services (DHHS) has determined that benzene causes cancer in humans. Long-term exposure to high levels of benzene in the air can cause leukemia, cancer of the blood-forming organs.”

National Emissions Inventory 1999 Facility-based annual average emission rates of HAPs and criteria pollutants of interest from industrial point sources for 1999. Values in Avg TPY.

TCEQ State Implementation Plan Facilities 2001 Facility and process-based speciated point source emissions inventory used by TCEQ modeling staff for modeling 8-hour ozone SIP (August/September 2000 episode) in Houston for 18 VOC classes. Values in Avg TPY.

National Air Toxics Assessment 1999 Tract-based annual average ASPEN-modeled ambient concentrations and HAPEM-modeled population exposures at census tract level for Harris County for RIOPA VOC, carbonyl and PM2.5 compounds. Values in µg/m3.

Relationships of Indoor, Outdoor, and Personal Air (RIOPA) 2001 Personal exposure, outdoor and indoor concentrations measured at residences during each visit. The concentration of air pollutants were in eight separate tables based on the analytical types; VOC, Carbonyl, PM mass, PM XRF, PM ICPMS, PM OC EC, Particle phase PAH, Gas phase PAH). Aggregated by Census Tract. Values in µg/m3.

Questionnaires (Technician Walkthrough, Baseline Survey, and Activity questionnaire) results, air exchange rate, house volume, and average temperature and humidity inside and outside during the sampling. Also collected information concerning time and location of microenvironment where participants spent time during sampling.

1. Open the Properties for the NATA ASPEN dataset

2. Under the symbols tab, select “Graduated Symbols”

3. Select 10 classes and use “ASPENTotal” as the field

4. Select a custom color as Start color – select a light green

5. Select a custom color as End color – select a dark red

6. Apply

1. Click the Labels tab2. Select “ASPENTotal”3. Font = Calibri, 10, Bold4. Click effects and add a White Glow5. Repeat this process and set up

symbology and labels for the other polygon layers, use your own colors and label styles based on the fields listed below• NATA HAPEM 1999 Benzene: HAPEMTotal• RIOPA Outdoor Benzene: BENZ_OUT• RIOPA Personal Benzene: BENZ_PER

1. Open the Properties for the NEI 1999 Benzene layer

2. Under Symbols, select graduated Symbols

3. 8 classes, using “AvgOfEmiss”4. Change the Style to Traingle5. Start color: Cyan, Start size: 10

6. End color: Custom – dark blue, End size: 26

1. Label using “AvgOfEmiss”2. Font = Arial Black, 10, Bold, White

Color3. Click effects and add a black glow4. Repeat this process and set up

symbology and labels for the other point layers, use your own colors and label styles based on the fields listed below

NEI 1999 low level point sources Benzene: AvgOfEmiss

RIOPA Outdoor Benzene: AvgOfBenzene

1. Turn on the NEI 199 Benzene Layer, the NATA HAPEM layer, and County Boundaries

2. Highlight the NEI 1999 Benzene Layer and Open the Query Builder

3. Build an expression that read “( AvgOfEmiss > 10)” and click execute

4. Click “Statistics” and run them on the AvgOfEmissions field

5. Click the Buffer tool6. Select a buffer distance of 5

miles, and hit apply7. Clear buffer

1. Select the Measure tool2. Measure the distance from the highest

emission average to the highest exposure average, record this distance

3. Clear your selection by clicking the Eraser4. Highlight the NEI 1999 Benzene Layer and

Open the Query Builder5. Build an expression that read “( AvgOfEmiss

> 10)” and click execute6. Now run a Buffer using the distance you just

recorded7. Center your map by zooming in or out and go

to Edit>Copy Map Image to File and save your map as a jpeg

8. If time allows, create additional overlays using other datasets, such as the TCEQ 2001 emissions data with the RIOPA Exposure data