Transcript ArcGIS Georeferencing Tool

ArcGIS Georeferencing Tool
a quick how-to
Useful for historical data analysis
Contour or Isohyetal maps
Georeference image
Digitize data to create GIS dataset
Analyze or geoprocess
Scan desired image
Selected image needs
some reference
information that can
be identified
Example: counties,
lat/lon, state
boundaries, etc
ArcGIS project
Add boundary base
layers
counties, lat/lon, states
View- Georefernce tool
Lat/Lon lines
Zoom to approximate
image extent
Drag-n-drop image
Fit to display
Attempt to see boundary
features from both
image and base layers
Adjust zoom as needed
Use tool to click and
match features from
Image to Map
Auto-adjust snaps
features together
Image
Map
Snapped image
to map
Map
Image
Continue process at
selected areas across
image until aligned as
desired
Create new shapefile for
editing
Digitize contours
Attribute features
New data set can
be geoprocessed
for further analysis
Questions?