October 2008
Beginner to intermediate
1024 pages
31h 30m
English
Content preview from Programming Microsoft® SQL Server™ 2008Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Spatial Models
Let’s begin our discussion with an explanation of the two basic geospatial models: the planar and model geodetic model.
Planar (Flat-Earth) Model
The planar model is a flat surface where shapes are plotted using two-dimensional x- and y-coordinates. These coordinates are based on an arbitrary measurement system, so you can define any measurement unit you want (for example, centimeters, meters, kilometers, inches, feet, miles, pixels, and so on).
It makes sense to work with the planar model when dealing with relatively small areas (such as building floor plans), or even larger areas that are either conceptually flat or still small enough where the earth’s curvature does not skew the outcome of area and distance calculations. Realize ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.