MySQL spatial VS PostGIS

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Function

Mysql spatial extension

PostGIS

Spatial index

MyISAM only supports R tree index, InnoDB does not support

GIST tree (R tree varieties)

Space type support

Only two dimensional data

Two-dimensional, three-dimensional and curve

Space operation function

The space function is limited

The basic realization of spatial manipulation functions defined in OGC standard

Example: to find the blue point inside a polygon, MySQL space expansion can only be found in the minimum bounding rectangle (red box) of points, while PostGIS can detect any point inside a polygon.

Space projection

Does not support

Support a variety of common projective coordinate system

Example: to find the distance between two points. MySQL Spatial can only calculate the Euclidean space distance, but PostGIS can calculate the real space distances of different projection coordinates

Transaction support

Does not support

Provides a series of long transaction support PostGIS, can effectively support the complicated spatial analysis functions

Query efficiency

The loading speed: MySQL > PostGIS (transaction)

Create a spatial index: MySQL <PostGIS (diff split algo)

Query: MySQL PostGIS (Each has its own merits. different query results are not the same,)

Using the GIS system

Use less

The use of more, such as OpenStreetMap background database is Postgresql+Postgis

Summary: if only do some simple GIS application or LBS, MySQL provides spatial extensions can basically meet the. But if you need more complex, the MySQL spatial extensions provides features may not enough, then Postgresql+postGIS may be more suitable.

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Posted by Carrie at April 19, 2014 - 3:41 AM