Taking Microsoft SQL Server into the World of Spatial Data Management Milan Stojic, Michael Rys Program Managers DBI324

The Business Opportunity Increased user-sophistication More data sources More kinds of data Integrated systems and mash-ups Ubiquitous geographical technology GPS Online mapping services Availability of geographical data

demo Spatial Teaser

Customer-base management and development Environmental- related data impact, analysis, and planning Financial and economic analysis in communities Government-based planning and development analysis Market segmentation and analysis Scientific research study design and analysis Real-estate development and analysis

geography data type Geodetic (“Round Earth”) geospatial model: Ellipsoidal coordinates (Lat, Long, Z, M) Define points, lines, and areas with longitude and latitude Account for planetary curvature and obtain accurate “great circle” distances geometry data type Planar (“Flat Earth”) geospatial model projected ‘flat map’ (X, Y, Z, M) Define points, lines, and areas with coordinates Use for localized areas or non-projected surfaces such as interior spaces

The Mercator projection did not come out until Please play along

Well-Known-Binary: 0x CDDC C0D CDD CD D C07A CDD BD0F CDDC C0D41 Well-Known-Text: 'POLYGON(( , , , , ))' GML:

GEOMETRYCOLLECTION (POLYGON (( , , , )), LINESTRING ( , ), POLYGON (( , , , )), POLYGON (( , , , )), …..

demo Spatial Examples

CIRCULARSTRING (0 50, 90 50, , , 0 50) CURVEPOLYGON (CIRCULARSTRING (0 50, 90 50, , , 0 50)) If a circular linestring encloses an area, a curve polygon can be created Coordinate pair order is important for the geography type. This set of coordinates is ordered according to the “left foot rule” for exterior rings.

Both types provide static and instance methods Calculate distances, find intersections, etc. SELECT StreetName FROM Streets WHERE = 1 Find streets that intersect the Microsoft campus

BufferWithCurves() GEOGRAPHY = GEOGRAPHY::STGeomFromText('CIRCULARSTRING(0 50, 45 50, 90 50)',4326) GEOGRAPHY --Number of vertices: 11 GEOGRAPHY = GEOGRAPHY::STGeomFromText('CIRCULARSTRING(0 50, 45 50, 90 50)',4326) GEOGRAPHY --Number of vertices: 257 This method will construct the resulting polygon with circular arcs, often resulting in a dramatically smaller spatial object.

ReorientObject This method will reverse the order of coordinates which define polygon rings. This method is a NoOp on line strings, circular arcs and points. This method does only work with the GEOGRAPHY type.

demo More Spatial Examples

demo Generating and Loading Spatial Data

demo Spatial Indexing

Take advantage of comprehensive spatial support geometry and geography data types Methods for spatial operations On premise and in the cloud Build high performance spatial solutions Store spatial data with business data Spatial indexing Extend and integrate geospatial applications Industry-standards compatibility Comprehensive programmatic library

Some Spatial Presentations (with further links) and whitepapers: data-queries-in-sql-server-2012.aspx Forum: Blogs: Find Us {milans, Breakout Sessions DBI405 - Troubleshooting SQL Server Spatial Query Performance: A Deep Dive into Spatial Indexing

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