Mapping in the Cloud Name:_______________________Final Exam

100 pts

1. Two points are 5.7” apart on a 1:24000 map. What is the ground distance in miles and KM?

2. Two points are 5.7” apart on a 1:24,000 map. On another map, they are 4.4” apart. What is the scale of this map?

3. A field measure 5.7” by 4.4” on a 1:24,000 map. What is the area in: (3 pts each; 9 total)a) square miles: b) acres: c) square KM:

4. Explain this diagram.

5. Explain this diagram.

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6. The following lines of code create a KML layer based on a GeoRSS feed from flickr. Explain what this means.var georssLayer = new google.maps.KmlLayer('http://api.flickr.com/services/feeds/geo/?g=322338@N20&lang=en-us&format=feed-georss'); georssLayer.setMap(map);

7. Explain the diagram on the right.

8. Explain what is being represented on this map.

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9. Explain how the shadings in this map are calculated.

10. There are seven pixels that meet the criteria of single family housing and a 100-year flood. How many commercial land-use and 100-year flood pixels can you find? Indicate their position.

11. What is the value of z in the following example if the distances are cubed instead of squared?

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12. Explain the fields and tables in this database. How are the tables “related.”

City Latitude LongitudeOmaha 41.25 -96Atlanta 33.755 -84.39Lincoln 40.809722 -96.675278Des Moines 41.590833 -93.620833Memphis 35.1175 -89.971111Minneapolis 44.95 -93.2Washington DC 38.895111 -77.036667Cincinnati 39.133333 -84.5New York City 40.716667 -74Salt Lake City 40.75 -111.883333Chicago 41.881944 -87.627778Milwaukee 43.052222 -87.955833Cancun 21.160556 -86.8475

City_Name AirportOmaha OMAAtlanta ATLLincoln LNKDes Moines DSMMemphis MEMMinneapolis MICWashington DC WASCincinnati CVGNew York City JFKSalt Lake City SLCChicago ORDMilwaukee MKECancun CUN

13. Explain the query performed by these lines of PHP code.//connection to database and querying<?php

include 'mysql_connect.php';$table = "us_capitals";$sql = "SELECT name, usstate, population, Y(location), X(location) FROM $table WHERE

X(location) > 41.25 AND population < 500000";$res = mysql_query($sql);

14. Given that mobile mapping needs at least 3G speeds, what does this map indicate about the future of Internet-based mobile mapping? (10 pts)

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15. Insert a descriptive comment in each of the four places.////////

popdata = new Array (33185,6931,372,783,492,5668,11132,2185,3354,43954,7341,8595,25963,8819,3811,5934,9865,6564,10113,9660,11242,20587,8466,25018,1958,6170,36171,492003,2109,6259,3348,2729,5003,23365,1995,1790,1978,660,2454,55555,9490,3446,1029,2926,10610,756,6736,7874,4683,6701,8250,892,3710,8812,267135,35865,749,656,497,35279,7954,5171,3705,7247,4650,15747,2804,2992,9442,7564,31962,5349,10865,8656,1544,14155,142637,20344,36546,16835,5571,3083,1403,6570,5317,629,7273,4373,20044,9196,3701,823,14502)////////

var min=100000000; var max=-100000000; for (var i = 0; i < 93; i++) {//////// popdata[i] = Math.log(popdata[i])

if (popdata[i] < min) { min=popdata[i] }5

if (popdata[i] > max) { max=popdata[i] }}

////////

var range = max-min // compute an opacity as a range of the data values opacities = new Array () for (var i = 0; i < 93; i++) {

opacities[i] = 1-((max - popdata[i]) / range)}

16. Insert a descriptive comment in each of the three places.google.maps.event.addListener(map, 'click', function() { infowindow.close(); }); // // // // // downloadUrl("xample.xml", function(doc) { var xmlDoc = xmlParse(doc); var markers = xmlDoc.documentElement.getElementsByTagName("marker"); for (var i = 0; i < markers.length; i++) { // // // // // var lat = parseFloat(markers[i].getAttribute("lat")); var lng = parseFloat(markers[i].getAttribute("lng")); var point = new google.maps.LatLng(lat,lng); var html = markers[i].getAttribute("html"); var label = markers[i].getAttribute("label"); // // // // // var marker = createMarker(point,label,html); } // // // // // document.getElementById("side_bar").innerHTML = side_bar_html; }); }

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