lecture 1: introduction to intermediate gis -...

Lecture 11

Creating and Completing Project with GIS&

Global Navigation Satellite Systems

Lecture Outline

I. Creating and completing a project with GISA. Coming up with a topicB. The Design ProcedureC. Case Studies

II. Global Navigation Satellite SystemsA. About GNSS/GPSB. RangeC. Error CorrectionD. GPS ApplicationsE. Hardware and Software

Creating and Completing a Project with GIS

I. Coming up with a topicTwo approaches:1. Explore your own interests.

• What are you interested in?• What is realistic given the time frame?• How much data will I need and where will I get it?

2. Let the data decide.• Go to the various web pages I have given you and

choose some data that might be suitable for analysis.


I. The Design ProcedureA. Needs assessment

1. Define your objective.2. Decide what you need to achieve (review

project handout)3. Talk to someone about your objectives (i.e.,

verify with your instructor or employer)


I. The Design Procedure (cont.)B. Conceptual and logical design

1. Identify the layers you will need.2. Where will you get the data?3. What analysis are you going to do?4. In what order do you need to do your analysis?

(write it down and/or use ModelBuilder)C. Physical design

1. Where are you going to store the data?2. What format will the data be in (shapefile or

geodatabase)?3. What maps will you create?4. What projection will you use?


I. The Design Procedure (cont.)D. Automation plan

1. General outline of steps involved.E. Implementation

1. Get the job done


II. Putting it all togetherLook at sample posters on: Y:\sun_courses\306\Look in the Posters and Presentations folders for examples


III. Case Studies


III. Case StudyA. Needs assessment

1. Objectives: • To identify river systems that have been invaded.• To find the states and cities with the greatest number

of zebra mussel.• To identify the impact of dams.

2. At a minimum the project must include an overlay and a buffer.


III. Case StudyB. Conceptual and logical design

1. Layers and source of data:zebra mussel distribution - usgsdams - usgsrivers – ESRIcounties – ESRIStates – ESRI

2. Analysis to performa. Buffer and overlay of rivers and zebra mussel locations to

determine which systems are invaded.b. Intersect to determine which states are the most invaded.c. Intersect to determine how many dams have zebra mussels.


III. Case StudyC. Physical design

1. Data stored on my computer.

2. Data will be kept in a geodatabase format.

3. I will create a general reference map and three additional maps showing the distribution of dams, states, and rivers infested with zebra mussels.

4. I will keep the data in the usgs projection (UTM).


III. Case StudyD. Automation Plan

All layers

Zebra mussels

Dams

Create general reference map

(Map #1)

Perform intersect & create map

(Map #2)

Zebra mussels

Rivers

Buffer rivers, overlay on zebra musselsOutput results,

summarize by rivers(Map #3)

Zebra mussels

States

Perform intersect & create map(Map #4)


III. Case StudyD. Automation Plan

Reference map(Map #1)

Infested Dams(Map #2)

Rivers with Infestations(Map #3)

States with Infestations(Map #4)


• A.k.a GPS (Global Positioning Systems) give precise positional information, day and night, via the use of satellite technology.•Most common method of field data collection in GIS.


Three Components


Range distance is calculated based on signal travel time from the satellite to the receiver.

Range = speed of light * travel time


Range distance using multiple satellites:


Error corrections with GPS:

1. Differential GPS2. Real-Time Differential Positioning3. WAAS (Wide Area Augmentation

System)

PDOP:Positional Dilution of PrecisionAffected by satellite constellations, terrain, cloud cover and foliage cover.Low PDOP’s = High accuracyHigh PDOP’s = Low accuracy but more data collection.

GPS ApplicationsNavigation: ex. Driving directionsTracking: ex. Vehicle or animal trackingField Digitizing and Surveying:

Highly accurate compared to on-screen digitizing.Capture both coordinate and attributedata. Ex. Control point capture

Hardware and SoftwareCommon GPS Hardware

TrimbleLeicaDell

ESRI SoftwareArcPad

Rangefinder Integration:Binoculars which improve efficiency of data

collection and offers opportunities for access.

lecture 1: introduction to intermediate gis -...

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