Lecture 5 - GIS Data Collection Longley chp 9 Dr Matt Rice...

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Unformatted text preview: GIS Data Collection Longley, chp. 9 Dr. Matt Rice George Mason University Fall 2011 Overview • Introduction • Primary data capture • Secondary data capture • Data transfer • Capturing attribute data • Managing a data capture project Data Collection • One of most expensive GIS activities • Many diverse sources • Two broad types of collection – Data capture (direct collection) – Data transfer • Two broad capture methods – Primary (direct measurement) – Secondary (indirect derivation) Typical GIS Workflow & Activities Data Collection Techniques Raster Vector Primary Digital remote sensing images GPS measurements Digital aerial photographs Survey measurements Secondary Scanned maps Topographic surveys DEMs from maps Toponymy data sets from atlases From: Date: Fri Jun 12 10:53 MDT 1998 To: [email protected] Subject: Map Request for Effluent Reach of Mortandad Canyon Matt- I left you a voice mail this morning concerning this map request. The survey data points for effluent E1 and M1 are below. Plot these points with labels using FIMAD plot 106592 and 106593 as the base maps. Please contact me at 662‑XXXX when complete. Please plot 5 copies of each map.This requested delivery is next Friday 6/19 if possible. Thanks.----- Point number,Y coord,X coord,elevation, Point Label 26,1770244.6308718,1626602.5869557, 999999,ElE+025 ‑ 27,1770225.3936403,1626522.854846,7073.25,ElE+050 28,1770207.4836865,1626445.1665592,7084.29,ElE+075 29,1770171.4603106,1626371.5030241, 999999,ElE+100 ‑ 30,1770146.9066656,1626293.2654468,7115.98,ElE+125 31,1770145.319269,1626228.8509131,7122.72,ElE+150 32,1770143.8335994,1626151.4240025,7133.87,ElE+175 33,1770127.7221196,1626076.4179243,7137.82,ElE+200 34,1770125.6854205,1625997.9744874,7147.86,E1+225 35,1770155.4252674,1625923.5239987,7153.01,E1+250 36,1770134.7793053,1625843.1804302,7155.11,E1+275 37,1770153.8832895,1625765.1164967,7158.58,E1+300 38,1770133.5814036,1625678.5236667,7163.05,E1+325 39,1770160.8967095,1625605.6882355,7166.16,E1+350 40,1770158.510286,1625532.9668217,7169.53,E1+375 41,1770181.488187,1625448.3674154,7171.57,E1+400 . . . Client-server GIS Costs...
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  • Fall '11
  • Dr.Rice
  • Geographic information system, data capture, Secondary Data Capture, GIS Data Collection, data capture project

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Lecture 5 - GIS Data Collection Longley chp 9 Dr Matt Rice...

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