The 450 Field Exercise

8/14/2019 The 450 Field Exercise

http://slidepdf.com/reader/full/the-450-field-exercise 1/22

The 450 Field Exercise…

The Big Picture



The 450 Field Exercise…

1. Field survey of features (sketch w/coordinates)• And collect GPS data (waypoints) at the same time

2. Creation of vector data sets

3. Creation of raster data sets

4. Assign real-world coordinates to vector & raster data5. Create metadata for the data sets

6. Create overlay maps of different data sets

• Compare with GPS data and Air Photo, etc.

7. Write a summary report of the process



GPS used to obtain X-Y

coordinates AND to actually

record a waypoint of thefeature location (to be used

later)



Transfer your sketch to graph paper



Vector Data Text Files

• Using the coordinates derived from your

graph paper, create an X-Y event table and

ArcInfo Coverage generate files



Deliverables 1

• Bring to class:

– Copy of your sketch (1 per team) w/ names on it

– Your graph paper (w/board coordinates)

– Your X-Y Event Table

– Your 3 Generate Files



GIS (Vector) Data From Text Files

• Using X-Y Event Table create an X-Y Event

Layer and export that to a shapefile



GIS (Vector) Data From Text Files

• Using generate files create coverages (point,

line and polygon)



Add Vector Files to Geodatabase

• Create a File Geodatabase

• Create a Feature Dataset

• Convert your shapefile and coverages to

Feature Classes

• Add your X-Y Event Table as a Geodatabase

Table



Add Vector Files to Geodatabase

• Create Metadata for your Geodatabase and

everything in it (Feature Dataset, Feature

Classes and Table)



Raster Data Text Files

• Using the coordinates derived from your

graph paper, create an excel spreadsheet forthe raster cells covering the study area



Raster Data Text Files• Add a ‘header’ to the file and export this

spreadsheet to a text file to create an ‘ascii’raster text file



Raster Data Text Files



GIS (Raster) Data From Text Files

•

Using your ascii raster text file, create a rasterGRID of the study area



Add Raster Files to Geodatabase

• Add Grid to the File Geodatabase

• Create Metadata for your Geodatabse raster



Deliverables 2 (Lab 5)

• Bring to class:

– X-Y Event shapefile (board coordinates)

– 3 Coverages (board coordinates)

– Grid (board coordinates)

– Geodatabase (board coordinates)

• With feature datasets, classes, raster, etc.

• Including Metadata

• Post to web (for grading): – Map(s) showing the 4 vector & 1 raster layers



Assign Real-Wold Coordinates

(Vector Data)

• Reformat your X-Y Event Table to UTM

coordinates

• Create X-Y Event Layer and Feature Class in UTM




(Vector Data)

• Use Spatial Adjustment tools to relocate your

coverage data to UTM coordinates




(Vector Data)

• Re-project your GPS data (shapefiles) from

WGS-84 to UTM-83 (feature classes)




(Raster Data)

• Reformat your ascii raster header information

• Create a new raster Grid in UTM coordinates

•

Import UTM raster into Geodatabase



Document Your Work

• Metadata (for your geodatabase)

– Feature datasets (Raw & UTM)

– Feature classes (Board Coordinates & UTM)

– Raster (Board Coordinates & UTM)

– Tables

• Maps (overlays of different layers along with

Air Photo and/or GPS data)

• Written Summary

• Web page



Deliverables 3 (Lab 6)

• Bring to class:

– Vector data (UTM)

– Grid (UTM)

– Geodatabase (UTM vector & rasters & metadata)

• Hand (for grading)

– Metadata from Geodatabase

• Post to web (for grading):

– Map(s) with UTM vector and raster layers & GPS

– Written explanation of process

The 450 Field Exercise

Documents