Class 10 - Geocoding API's and Project Work

http://www.batchgeocode.com

ABTECH student data...

http://www.batchgeocode.com/map/?i=fa0f74e82a9b0af45ba1b5b9e1088927

Class 7 - Starting you geodatabase

We will be doing an 'out of class' assignment this week since I am traveling to Valladolid, Mexico for a school trip. Please follow these directions as closely as possible.

FIRST: Prepare

1. Read Chapter 12 - Geodatabase Design Guide - Modeling Our World
2. Read An Overview of Geodatabase Design from the ESRI WebHelp
3. Explore some existed ESRI Data Models (templates you could use or modify)
4. Consider these design tips
5. Explore these design steps
   

SECOND: Document your design - 'Design Guide'. Create some type of document (Word, Excel, Visio, FreeMind) to document your database design. Make sure to include:

• Purpose of the database: What functions do you want the database to perform. What analysis will you do with it? What kind of maps will you make?

• Included layers: What kinds of layers are required for your geodatabase to perform the functions and operations you wish?
  
• For each layer, include the geometry type (point, line, poly) if vector or the type of raster data.
  
• Include the attributes that might be necessary for your geodatabase feature classes.
  
• Give some examples of how you might validate the attributes through domains
• Give some examples of how you might better classify your data using subtypes
• List what feature classes my be organized either thematically or spatially in feature datasets
• What will be the projection/spatial reference of your feature classes?
• This information on modeling feature classes will be helpful to read.

• Other information: What other information (non-spatial) will need to included in your database?
  

THIRD: Research data availability

• Conduct internet searches to find existing digital datasets to include in your geodatabase
• Describe data you may need to create

FOURTH: Create 'test' geodatabase

• Create a file based geodatabase
• Incorporate an data you have located into the geodatabase
• Keep them as simple feature classes for now but be thinking about how to build more functionality into geodatabase. That's next!

!!! TURN IN NEXT WEEK !!!

1. Your geodatabase
2. Your design guide
   

Lab Test 1 Review

1. Georeference CAD data
2. Save world files
3. Creating geodatabases
   
4. Select data based on criteria (select by attributes)
   
5. Convert CAD feature classes to Geodatabase feature classes

Differential Correction

Autonomous GPS - no correction. +/- 10 meter

Differential GPS
-real-time- Radio Beacon / SBAS / Post-processing

GPS data collection with Trimble TerraSync and the GeoXT

Last class we created a data dictionary to use during our field data collection. Allen Instruments has a great operational instruction document for the GeoXT and TerraSync. It is short and to the point. It should not be used instead of the Trimble TerraSync Operation Guide by it is a great field guide. See the Trimble TerraSync Operation Guide for more in-depth instructions.

Lab Quiz

Wednesday, November 7th, 2007

To successfully complete the lab quiz, you will need to do the following at a minimum.

1. Create a file-based geodatabase
2. Import a CAD feature class into the geodatabase
3. Create a new feature class in the geodatabase
4. Add and/or delete fields from the above feature classes
5. Add domains (range and coded valule) to the geodatabase
6. Apply domains and defaults to the feature class fields
7. Create features by editing in ArcMap

Subtypes and domains

• Create a sidewalks feature class. Polygon / import spatial reference from other campus data.
• Add fields for Width (integer), Material (Integer), and Condition (Text)
• Add coded value domains to the geodatabase - Width (2,4,6), Material ( 1= Concrete, 2 = Asphault, 3 = Gravel). Condition (Good, Fair, Poor)
• Apply domains to fields
• Create subtype for Material - Default concrete
• Apply default values and domains to subtypes (Concrete- condition = Good, width = 4)(Asphault- condition = Fair, width = 4)(Gravel- condition = Poor, width = 2)
• Go into ArcMap, add sidewalks and start editing. Notice the functionality subtypes and domains give to the editing process.