gps gis gis in campbell river
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GPS GIS GIS in Campbell River. GPS GIS GIS in Campbell River. GPS: Global Positioning System. Originally designed for use by the military It is a satellite-based, radio navigation system giving accuracies of around 25 meters, anywhere on earth. How receivers use satellites. - PowerPoint PPT PresentationTRANSCRIPT
GPSGPSGISGISGIS in Campbell GIS in Campbell RiverRiver
GPSGPSGISGISGIS in Campbell GIS in Campbell RiverRiver
GPSGPSGISGISGIS in Campbell GIS in Campbell RiverRiver
GPSGPSGISGISGIS in Campbell GIS in Campbell RiverRiver
GPS: Global Positioning GPS: Global Positioning SystemSystem
Originally designed for use by the militaryIt is a satellite-based, radio navigation system
giving accuracies of around 25 meters, anywhere on earth
How receivers use satellitesHow receivers use satellitesReceivers are able to determine the distance to a
satelliteNeed at minimum of four satellites to determine
your location in 3D (there are four unknows: latitude; longitude, height and receiver clock error)
Two satellites and you know the distance to each one
Three satellites with three known distances
Errors inherent to GPSErrors inherent to GPSPositional error is due to:
– the individual GPS pseudorange – dilution of precision effect of the satellite geometry
Errors in GPS:
Pseudorange
Differencing to correct for pseudorangeDifferencing to correct for pseudorange
Errors in GPS: Dilution of precisionErrors in GPS: Dilution of precisionDue to the position of the satellites
Good geometry Bad geometry
GPSGPSGISGISGIS in Campbell GIS in Campbell RiverRiver
GPSGPSGISGISGIS in Campbell GIS in Campbell RiverRiver
GIS: Geographic Information GIS: Geographic Information SystemSystem
GIS is a computer system capable of assembling, storing, manipulating, and displaying geographically referenced information
Relate information from different sources as long as the location of variables are known (aerial photographs with water sampling information)
Data captureData captureData available in digital form, in a form the
computer can recognizeIf the data to be used are not already in digital
form, various techniques can capture the information. Maps can be digitized, or hand-traced with at computer mouse, to collect the coordinates of features. Electronic scanning devices will also convert map lines and points to digits
Data can be collected with a GPS unit
Data collection methodologyData collection methodologySHIM: Sensitive Habitat Inventory and
Mapping– Collects the centerline of the stream (points or
dynamic line) while locating habitat features and features affecting fish distribution and stream health
– Examples of features:
Bridges, Culverts, Bank Erosion, Storm Drain
Enhancement Sites, Spawning Habitat, Wetlands
Integration of DataIntegration of DataVarious programs to integrate the dataProcess of adding layersAbility to link to databases
Integration of Data Integration of Data Final Product Final Product
GPSGPSGISGISGIS in Campbell GIS in Campbell RiverRiver
GPSGPSGISGISGIS in Campbell GIS in Campbell RiverRiver
GIS in Campbell RiverGIS in Campbell River
Streams with SHIM Data in the Campbell
River Area and on Quadra Island
GIS in Campbell RiverGIS in Campbell River
Obtain GIS layers
Review the SHIM data and conduct Quality Assurance – Quality Control
Production of the Community Watershed Atlas and to get data included into the Sensitive Habitat Atlas