Transcript How to
How to build your own SkyNode A quick tutorial by Alberto Conti & Bernie Shiao Space Telescope Science Institute Baltimore, MD [email protected], [email protected] Introductory Notes This brief tutorial was written after Bernie and I spend a morning at JHU with Alex, Tamas and Wil to set up a SkyNode for GALEX (http://galex.stsci.edu). The implementation was rather easy, and we decided it would be a good idea to document the steps we undertook for others to follow. – – – GALEX uses MS SQL Server as its database server GALEX database backend is written in C# under .NET Framework 1.1 GALEX uses IIS as its web server Requirements (based on GALEX example) Database: <dbname>, i.e. GALEX Objects Table: <objtable>, i.e. PhotoObjAll – – – This table contains the catalog of all GALEX objects Each object has several attributes that will be accessible from each SkyNode <objtable> MUST contain: objID, RA, Dec htmID,cx,cy,cz Requirements: continued (based on GALEX example) Objects Table View: PhotoPrimary – This view is obtained from <objtable> The most general view is obtained by – create view PhotoPrimary as select * from <objtable> DBObjects Table: DBObjects – Contains the metadata information about the database, such as tables and user functions. Requirements: continued (based on GALEX example) DBColumns Table: DBColumns – – Contains the metadata information about each table, such as columns, UCDs, units, etc. A view name columns was needed for the GALEX implementation and is was generated by – create view columns as select * from dbcolumns HTM Functions – Run skynode-htmInstall.sql and install htm_v2.dll under C:\Program Files\Microsoft SQL Server\MSSQL\Binn Implementation Install SkyNode software under an IIS virtual directory: http://galex.stsci.edu/SkyNode Edit the Web.Config file and replace the database connection string: – <add key="SqlConnection.String“ value="Initial Catalog=<dbname>; Data Source=<dbhost>; User ID=<user>; Password=<password>;Connect Timeout=90" /> Implementation: continued Edit the Web.Config file and change the Info() dictionary information such as – – – – – – – – SurveyName SurveyArea MetaTable Sigma (astrometric precision) PrimaryTable RaName DecName Location Implementation: continued Run the following SQL scripts: – skynode-webSupport.sql – – Creates all the stored procedures used by the SkyNode web service skynode-getMatch.sql – Creates the matching stored procedure called by the XMATCH web method Finally… Provide the URL of your SkyNode web service to [email protected]: Important Note The database user <user> under which the SkyNode stored procedures will be executed, must also have execution privileges on db MASTER for ALL HTM stored and extended procedures.