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Using Staging Area Generator

925 bytes removed, 12:45, 7 October 2017
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* '''Gazetteer Seq No:''' this option allows to specify the flattening of the country structure into the main object tables, if gazetteer alternative names are used in {{IMSMANG}}. Alternative names in the country structure, if defined, have a sequence number. For example, if for each country structure element two alternative names are defined, the first one has sequence number 0 , the second one sequence number 1. If the standard gazetteer names should be used in the staging area, choose '''None'''. Otherwise, choose the appropriate sequence number.
* '''Do Geodata:''' this is a switch to enable/disable the generation of geodata. The staging area can either be created with non-geodata only, or including all the coordinates (points, polylines and polygons), i.e. the data stored in the GEOPOINT, GEOSPATIALINFO and related tables in {{IMSMANG}}. Refer to the section on geodata below for more details.
* '''Target SRID:''' when generating geodata in the staging area, the data can be re-projected. The Target SRID allows to define the projection. The default, 4326, corresponds to '''WGS 84''' and 3857 corresponds to '''WGS84 Web Mercator'''. For a complete list of available projections, issue the following query on an empty staging area (i.e. the one created after clicking on '''Validate Selections'''):<pre>select *from spatial_ref_sys</pre>
You may also consult http://spatialreference.org/ to find the SRID that you would like to use. PostgreSQL is using the EPSG standard.
{{Warning|Conversions/re-projections cannot be done between all coordinate systems/SRIDs. In fact, some coordinate systems are defined for and focus on a specific part of the world, and coordinates outside of this specific range cannot be represented. If this is the case, an error message such as the following will be displayed in the staging area generator progress window:
[[File:SAG_geo_error.png]]
[[File:SAG_geo_error2.png]]
If you encounter this error, please verify whether the chosen SRID for re-projection and the coordinates in the source IMSMA are compatible. It could also be something wrong with references between tables in the {{IMSMANG}} database. You will find more information in the log file.
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