Data Collection and Management with GPS & GIS Quentin Rund for the High Desert ESD.
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Transcript of Data Collection and Management with GPS & GIS Quentin Rund for the High Desert ESD.
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Data Collection and Management with GPS & GIS
Quentin Rund for the
High Desert ESD
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Getting to Know ArcGIS Section 1 - 2
Logistics• Daily schedule
• Start• Lunch• Finish
• Facilities• Refreshments and break area• Restrooms• Telephones and messages
• Feedback
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Getting to Know ArcGIS Section 1 - 3
Teaching methods• Lectures• Exercises• Demonstrations• Class materials
• Getting to Know ArcGIS Exercise book• Course CD• Lecture Notes
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Getting to Know ArcGIS Section 1 - 4
Topics covered in Getting to Know ArcGIS• Day One
• Getting to know GIS• Getting started with maps and data• Displaying data
• Day Two• Getting information about features• Analyzing feature relationships
• Day Three• Creating and editing data• Presenting data
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Workshop Agenda
Day One• Intro to Precision Ag• Determining Location• Navigating Waypoints• Collecting Waypoints• About Attributes• Data Layers
Day Two• Getting to know ArcGIS• Add data layers to GIS• Working with tables• Editing data• Symbolizing Data• GIS analysis• Discussion of GIS in the
classroom
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Me• Quentin Rund• PAQ Interactive• GIS since 1994• Remote Sensing• GIS data analysis• Farm background
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Workshop Effectiveness• Pre-Test
• Gauge knowledge• Establish baseline
• Post Test• See if improved (awake)• Evaluate methods
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Objectives• Gain experience with a handheld GPS• Collect data• Migrate data to a GIS• Use GIS to map features• Build local map• Discover ways to use GPS/GIS in the classroom
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Intro to Precision Ag Technologies
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Outline• Precision Ag• Tools of the Trade• Additional Resources
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Precision Ag Practices• Fertilizer – variable-rate application• Planting – row control, variable rate, variety• Harvest – collecting yield data• Remote Sensing – growth• Crop Scouting• Chemical Application
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Precision Ag Resources• NSF
• AgrowKnowledge• GeoTech Center
• Conferences• International Conference on Precision Agriculture• InfoAg
• Online Resources• Precisionag.com• Precisionagnetwork.com
Getting to Know ArcGIS Section 5 - 12
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NSF Resource Centers• www.agrowknow.org • www.geotechcenter.org
Getting to Know ArcGIS Section 5 - 13
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Conferences• www.icpaonline.org • www.infoag.org
Getting to Know ArcGIS Section 5 - 14
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Online Resources• www.precisionag.com • www.precisionagnetwork.com
Getting to Know ArcGIS Section 5 - 15
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Tools Needed for Precision Ag• Location• Data/Analysis• Equipment
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Workshop• GPS• GIS• Exercises• In the Classroom
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Getting to Know ArcGIS
GPS Technology
Section 5 - 18
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GPS Basics • Global Positioning System
• Satellite constellation• Receivers• Ground control system
• Information available• Location• Time• Speed• Direction
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Components of the GPS
Control Segment
Space Segment
User Segment
Monitor Stations
GroundAntennas
Master Station
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How It Works• Signal sent from satellites• Receiver determines distance from satellite• Uses multiple distances to triangulate position
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Signal from One Satellite
The receiver is somewhere on this sphere.
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Triangulation (1 sat)
Geometric Principle: You can find one location if you know its distance from other, already-known locations.
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Triangulation (2 sats)
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Triangulation (3 sats)
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Sources of Signal Interference
Earth’s Atmosphere
Metal Electro-magnetic Fields
Solid Structures
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Circle of Error
X
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Making it Better• WAAS• DGPS• RTK
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Geostationary WAAS satellites
GPS Constellation
WAAS Control Station (West Coast)
Local Area System (LAAS)
WAAS Control Station (East Coast)
Wide Area Augmentation System
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How GPS Is Used• Determining Location• Returning to Waypoints• Recording Waypoints
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GPS-Receivers
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Garmin eTrex• Buttons and pages
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Coordinate systems
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Coordinate Systems• DD – Decimal Degrees 42.675849°• DM – Degrees Minutes 42° 34.5675’• DMS – Degrees, Minutes, Seconds 42° 34’ 23.5”• UTM – Northing 23 484.45
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Exercise 1 Collecting Location• Objective
• Become familiar with basic use of receiver• Be able to change coordinate system formats
• Materials Needed• Worksheet• GPS Receiver
• Assignment• Choose series of objects• Walk to objects and record coordinates
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Discussion• Observations• Feature Sets
• Types of objects located• Thinking about data layers
• In the Classroom
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Post-Lunch• Review morning
• Precision Ag• GPS• Collecting Location
• Waypoints
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Waypoints• Examples of Using Waypoints
• Scouting• Remote Sensing Observations• Teacher Locations
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Waypoints
Waypoints are locations or landmarks that can be stored in your GPS. Waypoints may be defined and stored in the unit manually by inputting latitude and longitude from a map or other reference.
Or more usually, waypoints may be entered directly by taking a reading with the unit at the location itself, giving it a name, and then saving the point.
Latitude and Longitude
Your location
Direction of waypoint
Date andTime
Waypoint
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Getting to Know ArcGIS Section 1 - 41
Linking features and attributes • Feature classes are tables that store spatial data• Each feature has a record in the table
• Unique identifier links feature and attributes
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Exercise 2 Navigate Waypoints• Objective
• Use GPS to navigate to known points• Materials
• GPS Receiver• Worksheet with locations
• Assignment• Walk to coordinates and record features
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20 points
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• Cache of goodies established by individuals• Coordinates published on Web• Find cache
• Leave a message• Leave some treasure• Take some treasure
• http://www.geocaching.com/
Geocaching
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Discussion• Observations• In the Classroom• Rubric (from Terry Brase, Kirkwood College)
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Features/Attributes• Feature sets (discuss what’s been discovered)• How a feature set is a data layer
• Identify mappable objects that could become features on a map• Create a Data Outline for these features
• Attributes
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Identify Objects• Identify objects around this room that are “mappable” • Which items might be worthwhile to have an ‘inventory’ of?• Select two features from your list• Identify two attributes for each feature that you would want to know
about• Consider attribute values
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Exercise 3 Collecting Waypoints• Objective
• Consider features and attributes for spatial data• Choose feature set to inventory• Choose attributes to record• Survey campus for features• Go outside• Discussion
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Discussion• Observation• In the Classroom
• Research ways in which GPS is used• Weirdest use of GPS• Best use of GPS
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Data Entry• Keying in data
• Type data into excel or txt file• File transfer