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Assignment 3 - CSE 490H 08au Assignment 3 Rendering Map...

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CSE 490H 08au Assignment 3 Rendering Map Data Administrative Details Assigned : Tue 11/4/08 Due : Tue 11/18/08 at 4:30 pm Partners : Max of 2 people per group If you would like, you may pick a partner for this project. This will also be your partner for project 4 -- so choose wisely ;) Submit : via turnin on attu, as usual Starter Source Code : http://www.cs.washington.edu/education/courses/cse490h/ 08au/projects/geosource.zip Introduction A picture's worth a thousand words, so... the shortest description of this assignment is, do this: You will be using geographic survey data and census data to render a map of the major transportation/geographic features of the United States. The United States Census (www.census.gov) produces a dataset describing all roads, highways, cities, civic works
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(hospitals, parks, etc), bodies of water, etc. in the United States. This data set is referred to as the TIGER dataset (Topologically Integrated Geographic Encoding and Referencing system). We are using the "2006 TIGER/Line" dataset. This project relies on processing the raw TIGER input data, combining it with other census data (e.g., population estimates for municipalities), and rendering the map of the US as a set of tiles. We will use Hadoop to perform this processing in parallel. In the next assignment, you will take your computed data and host it on Amazon's EC2 and S3 platform, building a dynamic web application to allow access to your information. Effectively, assignment 3 is the Google Maps "backend" assignment, and assignment 4 will be building (a simplified version of) the Google Maps frontend without traffic direction routing. We have provided starter code at http://www.cs.washington.edu/education/courses/ cse490h/08au/projects/geosource.zip -- you should use this as the base for your project, conforming to its interfaces and extending it where indicated. Tiles, Ranges, Zoom Levels, and Tile Sets It is inefficient and unwieldy to attempt to render the entire map, at every zoom level you would like, as a single entity. So we break the map into tiles. A tile is a square region of the map corresponding to the smallest unit we render at a time. The view that you display in a web browser is made of several tiles arranged in a 2d grid. A tile is defined by a tile extent which is a northern-most and a southern-most latitude, and a western-most and eastern-most longitude. We are making a major simplifying assumption in this assignment, that latitude and longitude are a rectangular coordinate system. This will result in some rendering inaccuracy, but for the latitudes in the USA, this is acceptable. The tiles are arranged in a rectangular grid across a mappable range . The mappable range is the entire area we wish to render (e.g., the whole USA for your final production run, or maybe a few square miles for testing). A mappable range is a square (assuming rectilinear latitude/longitude) defined by the latitudes and longitudes of its edges. We break the mappable range into a 2D array of tiles.
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