Archive for the ‘Geography’ Category

Cost to Lay Cable for Caribou Residents

February 3, 2012 Leave a comment

Of the 320 buildings not serviced by Time Warner cable how much would each resident/owner of the buildings have to pay to get cable?  Assuming each building is owned by separate resident and assuming each resident approached Time Warner individually (not as a collective group)  they would be expected to pay an average of $2,590.  $828,600 / 320 = $2,589.375.  However, some of the residents are within a half a mile of where the cable terminates and others are several miles.  Between $1,000 to $60,000 per installation.  Below is a graph chart that shows how many residents would be expected to pay based on cost.

Based on a median income of $36,779 as of 2009 for Caribou residents I belive the cost is out of most people’s reach, even if Time warner contributes $1,000 per installation as they did on the estimate they gave me.


Rural Internet in Caribou ME

February 3, 2012 Leave a comment

Been a while eh?  A while back (June of 2011) I mapped out who could get Time Warner service in Caribou ME and who couldn’t.  I used the 2010 NAIP imagery to digitize all the homes in Caribou.  The homes in the rural areas I verified that they appeared to be used as well as the location where the cable seemed to terminate on the telephone lines.  Furthermore those homes/buildings that were set further back than 300 feet were also excluded since according to Time Warner this is too far to install cable for free.  These findings were compared with the results from to make sure I wasn’t excluding or adding any homes that did/did not have cable.  Based on this methodology Caribou had 3200 building of which 320 did not have access to cable.

By measuring where the cable stopped and which buildings did not have cable I estimated that for the whole city to be serviced an additional 218,726 feet, or 41.43 miles of cable would need to be laid.  At a cost of $20,000 per mile this would equate into a cost of $828,600 for Time Warner.

ESRI UC 2010 MGIS Presentation

July 31, 2010 Leave a comment

The ESRI UC 2010 was not as exciting as I remember when I first went there in 2005.  There were a few good discussions but overall it all seemed rather redundant.  However, there were a few notable exceptions. I also presented my Penn State Masters of GIS presentation. So now I have to make a few fixes to the paper and I’m done. I uploaded my presentation as unlisted, just follow the links below if you want to watch. 😀 Yahh!!

Categories: Geography, GIS, Video Tags: , , , ,

ESRI UC Almost Here

June 24, 2010 Leave a comment

Finished up my Masters of GIS project and submitted the paper to ESRI and now working on the Power Point for the conference.  I will be presenting at the ESRI UC on Jul 15 from 3:15 PM to 4:30 PM in Room 29 D, in the Terrain Modeling and Analysis paper session.  My presentation is called, Viewshed Creation: From Digital Terrain Model to Digital Surface Model. 

I will be glad when this is all over. When the papers become available through ESRI I’ll post a link and when my Power Point is done I’ll share it here also.

Categories: Geography, GIS Tags: , , , , ,

Viewshed Creation: From Digital Terrain Model to Digital Surface Model

February 2, 2010 Leave a comment

I recently presented to my faculty on my proposed Masters project.  My school does not have a do a thesis (thank goodness) instead we do a project and present at a conference.  Below is my proposed project given to my peers, faculty and my advisor.

Categories: Geography, GIS Tags: , , , , , , , , , ,

Viewsheds Compared

September 27, 2008 2 comments

By comparing line of sight DEM based viewsheds with a manual viewshed the different amount of error associated with different types of DEMs becomes evident.  I compared a manual viewshed against a 30 meter DEM from the Shuttle Radar Topography Mission (SRTM), a 30 meter DEM from the National Elevation Dataset (NED), 10 meter DEM from the NED and 3 meter DSM created from a .7 meter lidar cloud.  The same location and elevation was used in all the different viewsheds, the manual viewshed was both created using Google Streetview and I physically went to the location to verify the viewshed.  

To create the viewsheds I used Military Analyst for ArcGIS, this allowed the resulting viewshed to be limited by a range and the output was in vector format instead of raster format.  In order to calculate differences between the viewsheds the vector data was converted to a raster format using the same cell size and clipped to the same area to make sure each viewshed had the same number of pixels.

To quantify these findings I compared the difference between the pixels in the manual viewshed and the DEM viewshed.  I counted the differences where the manual viewshed’s pixel was visible and the dem viewshed was non-visible (V/NV), this was repeated for for visible/visible (V/V), non-visible/non-visible (NV/NV), and non-visible/visible (NV/V).  This method was used to compare the total number of pixels between viewsheds and total percentage of similar pixels.

These findings are far from complete but a step towards understanding the strengths and weaknesses in viewshed creation.  Further work would be to accurately account for the manual viewshed not taking tops of trees and buildings into consideration and to clean up the lidar DSM model by removing non-view obstructing artifacts such as power lines that show up as fence like objects.

Why Geography Matters

May 5, 2008 1 comment

Why Geography MattersSchool is over so hopefully I will get some more time to write in this blog.  One of the books for this last class was, “Why Geography Matters”by Harm de Blij.  The book is subtitled, “Three Challenges Facing America, Climate Change, The rise of China, and global terrorism.”  While there is a couple chapters devoted to the climate, one to China and two to terrorism the overall slant of the book is that of a world geography book. 

Every continent is discussed to some degree.  But more than a geography book, “Why Geography Matters” is interspersed with Mr. Blig’s opinions and hypothesis.  Some of these beliefs are traditional conservative ideas but a few touch upon controversial subjects such as the “truth” behind global warming, Islam and some geopolitical commentary. 

As a case in point, some say that global warming is real and it will negatively affect the world’s population and others say it is a normal cyclic process that the earth goes through.  Both parties point to science and history to prove their point, Mr. Blij believes in a cyclic process and the earth will eventually cool once again.  However, Mr. Blij notes that mankind’s actions are a wild-card in that we do not know if our actions will stave off another ice age. 

Mr. Blij also describes what it means to be a geographer.  We geographers have a very hard time telling others what we do at times, what our field encompasses.  Geography spans the physical and the human world, there is almost nothing that cannot be studied geographically.  Mr. Blijcompares the geography student trying to decide what he will explore to a child in a candy store; There is cultural geography, bio-geography, geomorphology, historical geography, political geographer, etc ad nauseam.

Geography touches all aspects of our life, nearly everything is connected to geography.

“Why Geography Matters” sells used for $4 plus shipping on Amazon.  I recommend it for anybody that wants to understand what geography is, wants to understand why geography is important or wants an easy to read world geography book.

Categories: Books, Geography Tags: ,