Monday, April 9, 2007

Did you know?

The WNCGIS Map Trivia (not a rocket scientist) Contest

Answer the 3 questions below and submit your answers to WNCGIS@gmail.com by April 24th and you could be the winner of the book, The Ghost Map by Steven Johnson, courtesy of Malaprop's Bookstore! (See separate posts about our contest sponsor, and the Map Trivia Contest Rules)

THE PROBLEM STATEMENT
Buncombe County is a little over 422,000 acres in size. Approximately 58,000 of those acres are held in Public Lands. About 190,480 acres are Developed Lands (developed = less than 10 acres in size) at the end of 2006. We also know that at the beginning of 1991 there were 219,151 acres of Private Rural Lands (parcels greater than or equal to 10 acres in size) according to our parcel density calculations. Now we would like to see how things are changing.

THE QUESTIONS
1) Approximately how many acres have been converted from Rural to Developed Lands since the end of 1990?

2) What is the approximate rate of change (acres/year) over the past 16 years from Rural Lands to Developed Lands?

3) How many years will it take to convert the remaining Rural Land to Developed Land if the rate of change continues at its current pace?

Clue #1: Total Acres = Public Lands + Private Rural Lands + Private Developed Lands
Clue #2: Change in Rural Lands = 1990 Rural Lands – 2006 Rural Lands
Clue #3: The time period between 1990 and 2006, between data collection dates, is very close to a full 16 years.
Other clues may be found elsewhere in the blog.

NOTES
1. Raw data for this quiz was gathered from Buncombe County Land Records at various points since the end of 1990.
2. Urban-rural acres are extracted via parcel density calculations.
3. Public lands are delineated by the NC Natural Heritage “Managed Area” data from early 2006. Most of this land is public. For this exercise, we are assuming this acreage is 100% public but we know small amounts are private landowner conservation easements.
4. This method overestimates Private Rural Land acres because road rights-of-way are included in this sum. For example, larger interstate interchanges such as those located on I-40, I-240 and I-26 will show up as rural land.
5. Rural and Developed Lands definitions mirror NRCS size classes in their NRI Rural and Urban & Develop Lands classifications.


THE ANSWERS
Answers to these questions will be posted on the Blog on April 26th. The drawing for the book will happen at the WNCGIS Gathering on that same date. Please submit your best guesses to these questions by April 24th to WNCGIS@gmail.com in order to enter the contest. You may be the lucky winner. You do not need to be present to win.

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