Spatial Data

SQL Server Spatial Indexes

  • Article

Spatial Data in SQL Server has special indexing because it has to perform specialised functions. It is able, for example, to break down an indexed space into a grid hierarchy by using a technique called tessellation. This is a rules-based system that, when you compare a shape to an index, works out how many cells in the the grid hierarchy are touched by that shape , and how deep down the grid hierarchy to search. There is powerful magic in Spatial Indexes as Surenda and Roy explain.

2015-04-15

7,242 reads

Introduction to SQL Server Spatial Data

  • Article

More and more applications require the handling of geospatial data. It is easy to store spatial data, but it takes rather more thought to retrieve and manipulate it. Tasks like searching neighborhoods, and calculating distances between points is often required from databases. But how do you start? Roy and Surenda take you through the basics.

2015-04-06

9,426 reads

Blogs

Daily Coping 18 Sep 2020

By

I started to add a daily coping tip to the SQLServerCentral newsletter and to...

Optimize for Unknown for Inline Table-Valued Functions

By

I had a curious performance issue today. An inline table-valued function (iTVF) was performing...

Daily Coping 17 Sep 2020

By

I started to add a daily coping tip to the SQLServerCentral newsletter and to...

Read the latest Blogs

Forums

SQL 2017 MLS - cant add new python packages

By sqldude7777

Hi I'm new-ish to MLS and have been trying to add new python packages...

Find row closest to date

By boehnc

Just having trouble getting this to work as I hoped. Trying to extract entire...

SQL Query - FULL JOIN multiple tables but return NULL results

By glennyboy

Good day! Need help with my sql query code; first FULL JOIN "ILEtransfer" no...

Visit the forum

Ask SSC

SQL Server Q&A from the SQLServerCentral community

Get answers