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GPHY384, weekly notes

by: Sarah Massar

GPHY384, weekly notes GPHY 384

Sarah Massar
GPA 3.9

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About this Document

These go over troubleshooting, data conversion, and data management.
Advanced GIS and Spatial Analysis
Stuart Challenger
Class Notes
25 ?




Popular in Advanced GIS and Spatial Analysis

Popular in Earth Sciences

This 2 page Class Notes was uploaded by Sarah Massar on Sunday February 7, 2016. The Class Notes belongs to GPHY 384 at Montana State University taught by Stuart Challenger in Fall 2015. Since its upload, it has received 29 views. For similar materials see Advanced GIS and Spatial Analysis in Earth Sciences at Montana State University.


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Date Created: 02/07/16
GPHY384 Lecture 4&5-Topology 2/2&4 Lecture 6 1/26 TROUBE SHOOTING: -If things aren’t quite working check: 1. Data -Spatial attributes -is the attribute table visible? Can we preview it? -Solution: re-download the data -Coordinate System -is it defined? -Solution: define using: “define projection” (see lecture 3 for instructions) -Wrong projection? -Solution: re-define it using: “projection” (see lecture 3) -Active Data Management -Do not put spaces in path names or use reserved characters (%,-, etc.) -i.e.- “Lab_1” NOT “lab 1” -Physically say where you want the data stored 2. Computer -if “cannot write” message appears -USB might either be full or bad -Move data to “C-drive” and try again 3. Software- ArcGIS -if there is a problem with the actual software -Start over, delete old work and begin again -use multiple Arc sessions to project data to keep the data bundle at a minimum -if there are bugs in the system -be creative, work around them -Arc uses a default geodatabase to store info, never use! Actively put data in your folder 4. Warmware- us! -take breaks DATA CONVERSION: -Data used to be hand written, so it had to be put into the computer via geocoding +Geocoding-conversion of spatial data into digital form -different ways to do this -Digitize- using a tablet or screen to trace maps into the computer -Scanning -Field Data Collecting -Different ways to attain data: 1. Primary Data Capture- direct measurement -Raster -via. remote sensing from satellites -Vector -surveying -GPS 2. Secondary Data Capture- conversion from hard copies -Raster -scanning -photogrammetry-manipulating raster data to make it more accurate -Vector -digitizing -COGO –Coordinate Geometry- where cadastral data comes from 3. Other Sources Lecture 7 2/4/16 REVIEW: -Data Organization: -Have full control over where and how data is stored/saved -make sure to save all data to a USB -make extensions visible -organize workflow into different Arc projects -the data will update itself, start different projects to keep “thinking” time short GO OVER LAB 3


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