[Geoserver-users] layers/data question

Alessandro_Ferrucci · March 31, 2009, 11:08am

Hello,

I would like to implement a map of the united states like the one in http://sigma.openplans.org/ . I have a question concerning the layers and the SLD. At a high zoom level they only display the outline of the continents and the major interstate highways, then as you drill down you display more and more data. Is this done purely with 1 dimension of layers or simply 1 SLD that at high zoom levels does not show most of the polygons/arcs ? What I mean by this is that in tiger you can download county based data (which has each county’s set) or the entire country’s set (which will have coarser grained data than the county’s obviously)
Is what they are doing pulling the country’s set at a specific zoom level and as the user zooms in pulls a different “set” of data? (meaning the county’s data as opposed to the country’s data set?) Do I have to download each county AND the entire country? or will each county suffice (without getting any country wide shapefiles) and just toggle stuff on and off at certain zoom levels?

I’m importing the shapefiles into postGIS.

On another note does anyone know where the SLD’s for http://sigma.openplans.org/ are kept? I like the style and would like to re-use them if possible.

Thanks!

–
Signed,
Alessandro Ferrucci

Justin_Deoliveira · March 31, 2009, 12:48pm

I am not sure if the SLD's are posted anywhere, but we would of course be willing to share them. CC'ing Ivan who heads up all our demos at OpenGeo.

Ivan: where can I get the latest and greatest styles for the sigma demo from?

Alessandro Ferrucci wrote:

Hello,

I would like to implement a map of the united states like the one in http://sigma.openplans.org/ . I have a question concerning the layers and the SLD. At a high zoom level they only display the outline of the continents and the major interstate highways, then as you drill down you display more and more data. Is this done purely with 1 dimension of layers or simply 1 SLD that at high zoom levels does not show most of the polygons/arcs ? What I mean by this is that in tiger you can download county based data (which has each county's set) or the entire country's set (which will have coarser grained data than the county's obviously)
Is what they are doing pulling the country's set at a specific zoom level and as the user zooms in pulls a different "set" of data? (meaning the county's data as opposed to the country's data set?) Do I have to download each county AND the entire country? or will each county suffice (without getting any country wide shapefiles) and just toggle stuff on and off at certain zoom levels?

I'm importing the shapefiles into postGIS.

On another note does anyone know where the SLD's for http://sigma.openplans.org/ are kept? I like the style and would like to re-use them if possible.

Thanks!

--
Signed,
Alessandro Ferrucci

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_______________________________________________
Geoserver-users mailing list
Geoserver-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/geoserver-users

--
Justin Deoliveira
OpenGeo - http://opengeo.org
Enterprise support for open source geospatial.

Alessandro_Ferrucci · March 31, 2009, 2:14pm

Would you also know if there is a detailed write up of how the tiger dataset was imported and is being used in the WMS layer ? Did you only import all county based shapefiles? Or did you also use some of the country wide shapefiles they provide at the top level FTP directory (for example: tl_2008_us_county.zip )

Thanks!

Alessandro Ferrucci

On Tue, Mar 31, 2009 at 8:48 AM, Justin Deoliveira <jdeolive@anonymised.com> wrote:

I am not sure if the SLD’s are posted anywhere, but we would of course be willing to share them. CC’ing Ivan who heads up all our demos at OpenGeo.

Ivan: where can I get the latest and greatest styles for the sigma demo from?

Alessandro Ferrucci wrote:

Hello,

I would like to implement a map of the united states like the one in http://sigma.openplans.org/ . I have a question concerning the layers and the SLD. At a high zoom level they only display the outline of the continents and the major interstate highways, then as you drill down you display more and more data. Is this done purely with 1 dimension of layers or simply 1 SLD that at high zoom levels does not show most of the polygons/arcs ? What I mean by this is that in tiger you can download county based data (which has each county’s set) or the entire country’s set (which will have coarser grained data than the county’s obviously)
Is what they are doing pulling the country’s set at a specific zoom level and as the user zooms in pulls a different “set” of data? (meaning the county’s data as opposed to the country’s data set?) Do I have to download each county AND the entire country? or will each county suffice (without getting any country wide shapefiles) and just toggle stuff on and off at certain zoom levels?

I’m importing the shapefiles into postGIS.

On another note does anyone know where the SLD’s for http://sigma.openplans.org/ are kept? I like the style and would like to re-use them if possible.

Thanks!

–
Signed,
Alessandro Ferrucci

Geoserver-users mailing list
Geoserver-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/geoserver-users

–
Justin Deoliveira
OpenGeo - http://opengeo.org
Enterprise support for open source geospatial.

–
Signed,
Alessandro Ferrucci

Justin_Deoliveira · March 31, 2009, 3:59pm

The process used to import the data was written up in detail and is available on the wiki:

http://geoserver.org/display/GEOSDOC/Loading+TIGER+data

Hope that helps.

Alessandro Ferrucci wrote:

Would you also know if there is a detailed write up of how the tiger dataset was imported and is being used in the WMS layer ? Did you only import all county based shapefiles? Or did you also use some of the country wide shapefiles they provide at the top level FTP directory (for example: tl_2008_us_county.zip <ftp://ftp2.census.gov/geo/tiger/TIGER2008/tl_2008_us_county.zip> )

Thanks!

Alessandro Ferrucci

On Tue, Mar 31, 2009 at 8:48 AM, Justin Deoliveira <jdeolive@anonymised.com <mailto:jdeolive@anonymised.com>> wrote:

    I am not sure if the SLD's are posted anywhere, but we would of
    course be willing to share them. CC'ing Ivan who heads up all our
    demos at OpenGeo.

    Ivan: where can I get the latest and greatest styles for the sigma
    demo from?

    Alessandro Ferrucci wrote:

        Hello,

        I would like to implement a map of the united states like the
        one in http://sigma.openplans.org/ . I have a question
        concerning the layers and the SLD. At a high zoom level they
        only display the outline of the continents and the major
        interstate highways, then as you drill down you display more and
        more data. Is this done purely with 1 dimension of layers or
        simply 1 SLD that at high zoom levels does not show most of the
        polygons/arcs ? What I mean by this is that in tiger you can
        download county based data (which has each county's set) or the
        entire country's set (which will have coarser grained data than
        the county's obviously)
        Is what they are doing pulling the country's set at a specific
        zoom level and as the user zooms in pulls a different "set" of
        data? (meaning the county's data as opposed to the country's
        data set?) Do I have to download each county AND the entire
        country? or will each county suffice (without getting any
        country wide shapefiles) and just toggle stuff on and off at
        certain zoom levels?

        I'm importing the shapefiles into postGIS.

        On another note does anyone know where the SLD's for
        http://sigma.openplans.org/ are kept? I like the style and
        would like to re-use them if possible.

        Thanks!

        -- Signed,
        Alessandro Ferrucci

        ------------------------------------------------------------------------

        ------------------------------------------------------------------------------

        ------------------------------------------------------------------------

        _______________________________________________
        Geoserver-users mailing list
        Geoserver-users@lists.sourceforge.net
        <mailto:Geoserver-users@lists.sourceforge.net>
        https://lists.sourceforge.net/lists/listinfo/geoserver-users

    -- Justin Deoliveira
    OpenGeo - http://opengeo.org
    Enterprise support for open source geospatial.

--
Signed,
Alessandro Ferrucci

--
Justin Deoliveira
OpenGeo - http://opengeo.org
Enterprise support for open source geospatial.

Alessandro_Ferrucci · March 31, 2009, 5:07pm

Hello,

I had seen this write-up but this process is for older line files not shapefiles. I understand that importing shapefiles is far easier. I have imported 2 counties worth of data. I’m wondering if all I need to do is import all counties without having to worry about country or state shapefiles (if you look on the tiger FTP you have country-wide shapefiles and then each state has state-wide shapefiles). Do I need to bother with those for less granular zoom levels? or do all zoom levels use the county specific shapefiles tiled together (with features turned off using the SLD?)

Thanks!

Alessandro Ferrucci

On Tue, Mar 31, 2009 at 11:59 AM, Justin Deoliveira <jdeolive@anonymised.com> wrote:

The process used to import the data was written up in detail and is available on the wiki:

http://geoserver.org/display/GEOSDOC/Loading+TIGER+data

Hope that helps.

Alessandro Ferrucci wrote:

Would you also know if there is a detailed write up of how the tiger dataset was imported and is being used in the WMS layer ? Did you only import all county based shapefiles? Or did you also use some of the country wide shapefiles they provide at the top level FTP directory (for example: tl_2008_us_county.zip ftp://ftp2.census.gov/geo/tiger/TIGER2008/tl_2008_us_county.zip )

Thanks!

Alessandro Ferrucci

On Tue, Mar 31, 2009 at 8:48 AM, Justin Deoliveira <jdeolive@anonymised.com mailto:[jdeolive@anonymised.com](mailto:jdeolive@anonymised.com)> wrote:

I am not sure if the SLD’s are posted anywhere, but we would of
course be willing to share them. CC’ing Ivan who heads up all our
demos at OpenGeo.

Ivan: where can I get the latest and greatest styles for the sigma
demo from?

Alessandro Ferrucci wrote:

Hello,

I would like to implement a map of the united states like the
one in http://sigma.openplans.org/ . I have a question
concerning the layers and the SLD. At a high zoom level they
only display the outline of the continents and the major
interstate highways, then as you drill down you display more and
more data. Is this done purely with 1 dimension of layers or
simply 1 SLD that at high zoom levels does not show most of the
polygons/arcs ? What I mean by this is that in tiger you can
download county based data (which has each county’s set) or the
entire country’s set (which will have coarser grained data than
the county’s obviously)
Is what they are doing pulling the country’s set at a specific
zoom level and as the user zooms in pulls a different “set” of
data? (meaning the county’s data as opposed to the country’s
data set?) Do I have to download each county AND the entire
country? or will each county suffice (without getting any
country wide shapefiles) and just toggle stuff on and off at
certain zoom levels?

I’m importing the shapefiles into postGIS.

On another note does anyone know where the SLD’s for
http://sigma.openplans.org/ are kept? I like the style and
would like to re-use them if possible.

Thanks!

– Signed,
Alessandro Ferrucci

Geoserver-users mailing list
Geoserver-users@lists.sourceforge.net

mailto:[Geoserver-users@lists.sourceforge.net](mailto:Geoserver-users@anonymised.comrge.net)

https://lists.sourceforge.net/lists/listinfo/geoserver-users

– Justin Deoliveira
OpenGeo - http://opengeo.org
Enterprise support for open source geospatial.

–
Signed,
Alessandro Ferrucci

–
Justin Deoliveira
OpenGeo - http://opengeo.org
Enterprise support for open source geospatial.

–
Signed,
Alessandro Ferrucci