Join Adam Wilbert for an in-depth discussion in this video Understanding raster data, part of Learning ArcGIS.
…The other popular method of storing geospatial…data is through a process called rasterization.…Raster data is a grid of cells organized into columns and rows called pixels.…Each cell can hold a single color or value which…can represent all kinds of information, from the color of light…that are reflected off the surface, or an elevation above…sea level, or how many inches of rain fell in January.…And as you stack these cells together into a large gridded surface,…they cover an area of the earth, just like a giant chessboard.…The most common raster formats that you will work with is an areal photograph.…
And they're exactly what you expect them to be.…Photographs of the earth taken from a satellite or an aircraft.…Aerial images go through a process called orthorectification, which…eliminates most of the distortion that comes with the…perspective and camera lenses and tags the image with…location attributes, so that it correctly aligns on the GIS.…The grid of cells each represents an area of the earth's surface,…
Author
Released
3/11/2014- Understanding vector vs. raster data
- Modifying metadata
- Adding data to a map
- Importing data from online providers
- Labeling features
- Joining data
- Clipping data to a study area
- Working with map layouts
- Creating a legend
- Printing and exporting the map to a file
Skill Level Beginner
Duration
Views
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Introduction
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Welcome1m 7s
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Using the exercise files2m 15s
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Working with GIS data files3m 38s
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1. Getting Started
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What is GIS?4m 58s
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Understanding layers7m 24s
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Identifying features3m 38s
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Making selections7m 50s
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Viewing attribute tables5m 30s
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2. Exploring Geospatial Data
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Introducing ArcCatalog7m 53s
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Exploring vector data2m 11s
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Understanding raster data4m 17s
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Exploring raster data6m 19s
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3. Organizing the Map
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Adding data to the map5m 37s
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Labeling features6m 50s
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Classifying data4m 47s
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4. Creating Data
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Creating new data files4m 21s
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Exploring ArcToolbox7m 26s
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Joining data5m 43s
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Creating buffers5m 9s
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5. Finishing the Map
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Working with map layouts5m 5s
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Inserting a locator map3m 13s
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Creating a legend5m 44s
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Conclusion
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Next steps1m 35s
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Video: Understanding raster data