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• Don’t forget to check out the Fusion IO Lounge• Find out about SQL Relay, SQL Saturdays, Pass

and the User Groups in your area!

Housekeeping• Health and Safety

– If there is a fire alarm today, make your way outside to the meeting point in the main car park

– There is no fire drill today• Breaks

– A.M. - 10:30, 11:50– Lunch - 13:00-13:40– P.M. - 15:50– Sponsor Prize Giving Exhibition Hall – 17:15

• Smoking– Don’t do it mate - it’s not worth it…

• Prayer Room – ask at the Hotel reception

Internet and Guide Book

Wi-Fi – The details are as follows:• Connect to ‘Venues Wi-Fi’• Open the web browser• Enter your email and password: venues• Click to accept the terms and conditions• Click on FREE Wi-Fi iconGuide BookUse the iPad app or browse http://m.guidebook.com/g/sqlbits11

Fusion IO Lego Draw

Fusion IO will be drawing numbers at random throughout the day and tweeting the winners of their Lego IO drive competition

Enjoy SQLBits 11

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About MeLeonard Lobel• CTO & Co-Founder

• Sleek Technologies, Inc.• Principal Consultant

• Tallan, Inc.• Microsoft MVP

• SQL Server• .NET consultant and trainer• Speaker• Author• Programming since 1979

Contact• Email: lenni.lobel@sleektech.com • Blog: lennilobel.wordpress.com• Twitter: @lennilobel

sleek technologies

Read All About It!

Agenda

• Overview• Defining Spatial Data• The two spatial models• Spatial standards

• Demos• geography• geometry• Area, distance, length calculations• Intersection and union manipulations• Many more spatial methods• Bing Maps mash-up

http://bit.ly/sqlbits2013_geospati

al

(all lower case!)

Download Slides and Code

SQL Server Spaces Out• Integrate location awareness into any application

– Long been the domain of sophisticated GIS applications• GIS

– A system for capturing, storing, analyzing, and managing data and associated attributes which are spatially referenced to the earth

• Allow a user to interact with information that is relevant to locations that they care about:– Home, work, school, or vacation destinations

• Two geospatial models– Planar– Geodetic

Spatial Data Types• Two spatial models = Two system CLR types• geometry

– Planar (flat) model– Flat 2-dimensional Cartesian Coordinate system– X and Y coordinates with uniform units of measure– Use for mapping small areas

• geography– Geodetic (round-earth) model– Latitude and longitude– Use for larger mapping where land mass is too big to fit on one

planar projection

Planar Spatial Model• Two-Dimensional Surface

– X and Y coordinates on an arbitrary plane• Flat Earth Projection

– To work with geospatial data on a 2D surface, a projection is created to flatten the geographical objects on the spheroid

– Example: Planar Model based on Mercator Projection

Antarctica

Greenland

North America

Africa

Square KM:- Antarctica = 13 million- Greenland = 2 million- N. America = 24 million- Africa = 30 million

Geodetic Spatial Model• Accurate geographic measurements

– Locations on planet surface described by latitude and longitude angles• Ellipsoidal sphere

– Latitude = angle N/S of the equator– Longitude = angle E/W of the Prime Meridian

Spatial Data Standards• Open Geospatial Consortium (OGC)

– International standards body• Microsoft belongs to the OGC

– SQL Server 2008 uses the OGC’s Simple Feature Access standards• OpenGIS Simple Feature Interface Standards (SFS)

– A well-defined way for applications to store and access spatial data in relational databases

– Described using vector elements; such as points, lines and polygons• Three ways to import geospatial data

– Well-Known Text (WKT)– Well-Known Binary (WKB)– Geographic Markup Language (GML)

Well-Known Text (WKT)• WKT examples:

• POINT(6 10)• POINT(-111.06687 45.01188)• LINESTRING(3 4,10 50,20 25)• POLYGON((1 1,5 1,5 5,1 5,1 1),(2 2, 3 2, 3 3, 2 3,2 2))• POLYGON((

-75.17031 39.95601, -75.16786 39.95778,-75.17921 39.96874, -75.18441 39.96512,-75.17031 39.95601))

• MULTIPOINT(3.5 5.6,4.8 10.5)• MULTILINESTRING((3 4,10 50,20 25),(-5 -8,-10 -8,-15 -

4))• GEOMETRYCOLLECTION(POINT(4 6),LINESTRING(4 6,7 10))• CIRCULARSTRING(1 5, 6 2, 7 3)

Geospatial Methods• STArea• STBuffer• STCentroid• STDifference• STDimension• STDistance• STEnvelope• STGeomFromText• STIntersection• STIntersects• STPointFromText, STLineFromText, STPolyFromText• STPointFromWKB, STLineFromWKB, STPolyFromWKB• STSymDifference• STUnion• GeomFromGml• Parse• ToString• and more (about 70 total)

Spatial Data Types

0,0 150,0

150,1500,150300,150

300,0

150,300 300,300

50,50

100,100

20,180 180,180

Spatial Improvements InSQL Server 2012

• Circular Arcs• CircularString• CompoundCurve• CurvePolygon

• All existing methods work on circular objects• New spatial methods

• BufferWithCurves• STNumCurves, STCurveN• STCurveToLine• CurveToLineWithTolerance• IsValidDetailed• HasZ, HasM, AsBinaryZM• ShortestLineTo• UnionAggregate, EnvelopeAggregate, CollectionAggregate, ConvexHullAggregate• MinDbCompatibilityLevel

Spatial Improvements InSQL Server 2012

• Improved Precision• Constructions and relations use 48 bits of precision (previously 27 bits)

• geography Enhancements• Support for objects larger than a logical hemisphere (“FullGlobe”)• Support for new and previous “geometry-only” methods

• New SRID• Spatial reference ID 104001 (sphere of radius 1)

• Performance Improvements• Better tuning and hints• Auto Grid indexing with 8 levels (previously 4 levels)

• Other Improvements• New histogram stored procedures• Support for persisted computed columns

Spatial Improvements inSQL Server 2012

Europe’s Premier Community SQL Server Conference

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