Tier 2 Training

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# Tier 2 Training - PowerPoint PPT Presentation

Tier 2 Training. Projection/ArcCatalog. We start off with Projection !. Projection in a few sentences. A map projection is a method of showing the 3-D planet Earth on a 2-D plane, (inevitably causing distortions). The distortion can occur in distance, area, shape, or direction.

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## PowerPoint Slideshow about 'Tier 2 Training' - talib

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Presentation Transcript

### Tier 2 Training

Projection/ArcCatalog

### We start off with Projection !

Projection in a few sentences

• A map projection is a method of showing the 3-D planet Earth on a 2-D plane, (inevitably causing distortions).
• The distortion can occur in distance, area, shape, or direction.
• Each projection will result in different types and amounts of distortion.

Coordinate System

• After projecting 3-D planet to a 2-D plane, it must have an X and Y coordinate to know where features are.
• UTM and BC Albers has its own x and y coordinate system.
• Longitude and Latitude does not need a projection to identify it’s feature location.

iMapBC

• iMap can show all 3 coordinates at the same time of the same location.

Which projection/coordinate system do you use ?

• There are 3 common type you will be working on:
• BC Albers
• UTM
• Geographic (Longitude, Latitude)

BC Albers

No Zone? It’s the whole BC

Things to Remember

• BC Albers is one set of coordinates with zero area distortion for any part of BC (only BC).
• UTM are in different zones. If a GIS data is in UTM 10, and you change it to UTM 11, the data will therefore, fly off somewhere else.
• Longitude and Latitude must be in decimals and not in degrees for ArcGIS to recognize the coordinates. Use a longitude to latitude, degree to decimal conversion website, e.g.
• http://www.fcc.gov/mb/audio/bickel/DDDMMSS-decimal.html
• The best choice, if possible, is the BC Albers projection.

ArcCatalog

• Allows you to connect data to both ArcCatalog/ArcMap (Important)
• These data can be in your network drive or external connection (LRDW)
• Create GIS formats from scratch
• View some GIS formats as one file, not many (ex. Shapefile)
• GIS data management
• Preview spatial data/tables with basic tools (zoom in, zoom out .etc)
• Allows you to search/filter items inside your directory (Important)
• Open and run Arctoolbox