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how to read and write sql spacial data with pascal
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Topic: how to read and write sql spacial data with pascal (Read 2510 times)
bernhard
Newbie
Posts: 1
how to read and write sql spacial data with pascal
«
on:
August 12, 2017, 01:06:18 pm »
I could not find information on using sql spacial data with PASCAL (
https://docs.microsoft.com/de-de/sql/relational-databases/spatial/spatial-data-sql-server
)
guess the data access will be stored procedures on the server, but how to get these data (data types) into my own code on the client side?
Any code examples will be fine
«
Last Edit: August 12, 2017, 01:08:52 pm by bernhard
»
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Thaddy
Hero Member
Posts: 14214
Probably until I exterminate Putin.
Re: how to read and write sql spacial data with pascal
«
Reply #1 on:
August 12, 2017, 02:57:13 pm »
This link is a little more appropiate. Not everyone here understands German:
https://docs.microsoft.com/en-us/sql/relational-databases/spatial/spatial-data-sql-server
Note that spatial data is not in any way part of any SQL specification. It is a .net based extension to SQL server only. i:e: it has not much to do with SQL. It is a language extension. Basically user-defined procedures. On the client side it simply looks like any other result set.
«
Last Edit: August 12, 2017, 03:04:59 pm by Thaddy
»
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Specialize a type, not a var.
avra
Hero Member
Posts: 2514
Re: how to read and write sql spacial data with pascal
«
Reply #2 on:
August 13, 2017, 12:45:55 pm »
Quote from: Thaddy on August 12, 2017, 02:57:13 pm
It is a .net based extension to SQL server only.
Spatial data is also used a lot with Open Street Map and SQLite3 via SpatiaLite extension:
http://wiki.openstreetmap.org/wiki/SpatiaLite
https://www.gaia-gis.it/fossil/libspatialite/index
https://www.gaia-gis.it/fossil/spatialite-tools/wiki?name=OSM+tools
https://www.gaia-gis.it/fossil/spatialite-tools/home
For showing OSM data in your pascal application take a look at these:
http://forum.lazarus.freepascal.org/index.php/topic,22103.msg133455.html#msg133455
http://forum.lazarus.freepascal.org/index.php/topic,16389.msg88763.html#msg88763
http://forum.lazarus.freepascal.org/index.php?topic=12674.0
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ct2laz
- Conversion between Lazarus and CodeTyphon
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marcov
Administrator
Hero Member
Posts: 11383
FPC developer.
Re: how to read and write sql spacial data with pascal
«
Reply #3 on:
August 13, 2017, 12:58:18 pm »
afaik OSM primarily uses Postgresql? The data side of postgres' spatial extensions are afaik layered over structure support, which afaik the FPC driver supports.
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