EPSG code for...

Christopher R. Thorne christhorne at SYMPATICO.CA
Fri Jun 10 14:09:37 PDT 2005


Dave,
Thanks for all your help i feel we are either very closer or this is 
really bad data??

I tried the these epsg codes and well see image. NAD83 layer is to the 
left and NAD27 layer is to the right. I had to find the layer by 
converting the map output to espg:4326 Lat/Long.

What do you make of it?
Chris



Dean C. Mikkelsen wrote:
> Hi Chris,
> 
> If we give SPCS a try, we can use the following:
> 
> # 405: california v: nad83
> <405> proj=lcc  datum=NAD83
> lon_0=-118 lat_1=35d28 lat_2=34d2 lat_0=33d30
> x_0=2000000 y_0=500000
> no_defs <>
> 
> For NAD83
> 
> And for NAD27 we can use the following:
> 
> # 407: california vii: nad27
> <407> proj=lcc  datum=NAD27
> lon_0=-118d20 lat_1=34d25 lat_2=33d52 lat_0=34d8
> x_0=1276106.450596901 y_0=1268253.006858014
> no_defs <>
> 
> Note the change in Zones. Los Angeles County was in CALIFORNIA ZONE VII.
> ZONE VII was eliminated
> for NAD83 with Los Angeles County being included with ZONE V. 
> 
> This should hopefully solve the shift problem you are seeing. I would
> aim towards the NAD27 variant for the original projection being defined
> and then aim at projecting out in NAD83.
> 
> Let me know what happens.
> 
> Cheers,
> Dean
>   
> Consultant, Terra ETL Ltd.
> North Vancouver, BC
> Canada
> Phone: +1 604 929 8630
> E-mail: dcmikkelsen at shaw.ca 
> 
> 
> 
> 
> -----Original Message-----
> From: UMN MapServer Users List [mailto:MAPSERVER-USERS at LISTS.UMN.EDU] On
> Behalf Of Christopher R. Thorne
> Sent: Wednesday, June 08, 2005 11:35 AM
> To: MAPSERVER-USERS at LISTS.UMN.EDU
> Subject: Re: [UMN_MAPSERVER-USERS] EPSG code for...
> 
> 
> I was worried about that ;) Unfortunately, it is not an easy thing to 
> pin point what the projection actually is.
> 
> Thanks again,
> Chris
> 
> Dean C. Mikkelsen wrote:
> 
>>Hi Ken,
>> 
>>Thanks for the information.
>> 
>>The other problem I was looking at is that it may be a State Plane
>>Coordinate System as well.
>> 
>>California is divided into many zones and the dataset being worked 
>>with
>>did not include some of the projection information.
>> 
>>Cheers,
>>Dean
>> 
>>Consultant, Terra ETL Ltd.
>>North Vancouver, BC
>>Canada
>>Phone: +1 604 929 8630
>>E-mail: dcmikkelsen at shaw.ca <mailto:dcmikkelsen at shaw.ca>
>>
>>    -----Original Message-----
>>    *From:* UMN MapServer Users List
>>    [mailto:MAPSERVER-USERS at LISTS.UMN.EDU] *On Behalf Of *Ken Lord
>>    *Sent:* Tuesday, June 07, 2005 12:44 PM
>>    *To:* MAPSERVER-USERS at LISTS.UMN.EDU
>>    *Subject:* Re: [UMN_MAPSERVER-USERS] EPSG code for...
>>
>>    Dean,
>>     
>>    Make sure you have the Proj software installed, there's
> 
> information
> 
>>    about it here:
>>     
>>    http://www.maptools.org/maplab/index.phtml?page=maplab_windows.txt
>>     
>>    and here:
>>     
>>    http://www.remotesensing.org/proj/
>>    <http://proj.maptools.org/> 
>>    If you haven't already, grab the windows binaries, unzip and place
>>    the Proj folder on your C drive.
>>     
>>    C:/Proj
>>     
>>    Cheers,
>>    Ken Lord
>>    Vancouver BC
>>     
>>
>>
>>     
>>    On 6/7/05, *Christopher R. Thorne* <christhorne at sympatico.ca
>>    <mailto:christhorne at sympatico.ca>> wrote:
>>
>>        Dean C. Mikkelsen wrote:
>>         > Hi Chris,
>>         >
>>         > It may be a directory problem, MapServer is not reading the
>>        CONUS or
>>         > NAD27/NAD83 files correctly in the proj directory.
>>         >
>>         > Are you using the MS4W or a later version of MapServer?
>>
>>        I am using the latest version of ms4w, with Chameleon using
>>        MapServer 4.4.2
>>
>>        Any suggestions?
>>
>>         >
>>         > Cheers,
>>         > Dean
>>         >
>>         > Dean C. Mikkelsen, B.Sc.,P.Eng.
>>         > Consultant, Terra ETL Ltd.
>>         > North Vancouver, BC
>>         > Canada
>>         > Phone: +1 604 929 8630
>>         > E-mail: dcmikkelsen at shaw.ca <mailto:dcmikkelsen at shaw.ca>
>>         >
>>         >
>>         >
>>         > -----Original Message-----
>>         > From: Christopher R. Thorne
> 
> [mailto:christhorne at sympatico.ca
> 
>>        <mailto:christhorne at sympatico.ca>]
>>         > Sent: Monday, June 06, 2005 4:10 PM
>>         > To: Dean C. Mikkelsen
>>         > Cc: MAPSERVER-USERS at LISTS.UMN.EDU
>>        <mailto:MAPSERVER-USERS at LISTS.UMN.EDU>
>>         > Subject: Re: [UMN_MAPSERVER-USERS] EPSG code for...
>>         >
>>         >
>>         > Yes I used these projections where
>>         >
>>         > 26911 NAD 83 is the projection of the mapfile and where
> 
> NAD27
> 
>>        <26711> is
>>         >
>>         > being reprojected.
>>         >
>>         > See first attached image to see how messed up the Nad27
> 
> layer
> 
>>        gets.
>>         >
>>         > If I don't define projection you can see the a shift
> 
> between
> 
>>        the line
>>         > layer and the solid polygon layers.
>>         >
>>         > Comments/suggestions??
>>         >
>>         > Thanks
>>         > Chris
>>         >
>>         > Dean C. Mikkelsen wrote:
>>         >
>>         >>Hi Chris,
>>         >>
>>         >>Did you try the following?
>>         >>
>>         >># NAD27 / UTM zone 11N
>>         >><26711> +proj=utm +zone=11 +ellps=clrk66 +datum=NAD27
> 
> +units=m
> 
>>         >>no_defs <>
>>         >>
>>         >># NAD83 / UTM zone 11N
>>         >><26911> +proj=utm +zone=11 +ellps=GRS80 +datum=NAD83
>>        +units=m  no_defs
>>         >
>>         >
>>         >><>
>>         >>
>>         >>Cheers,
>>         >>Dean
>>         >>
>>         >>Dean C. Mikkelsen, B.Sc.,P.Eng.
>>         >>Consultant, Terra ETL Ltd.
>>         >>North Vancouver, BC
>>         >>Canada
>>         >>Phone: +1 604 929 8630
>>         >>E-mail: dcmikkelsen at shaw.ca <mailto:dcmikkelsen at shaw.ca>
>>         >>
>>         >>
>>         >>
>>         >>-----Original Message-----
>>         >>From: UMN MapServer Users List
>>        [mailto:MAPSERVER-USERS at LISTS.UMN.EDU
>>        <mailto:MAPSERVER-USERS at LISTS.UMN.EDU>]
>>         >>On Behalf Of Christopher R. Thorne
>>         >>Sent: Monday, June 06, 2005 3:29 PM
>>         >>To: MAPSERVER-USERS at LISTS.UMN.EDU
>>        <mailto:MAPSERVER-USERS at LISTS.UMN.EDU>
>>         >>Subject: [UMN_MAPSERVER-USERS] EPSG code for...
>>         >>
>>         >>
>>         >>Hello all,
>>         >>
>>         >>If you were given the following information for two
>>        projections for
>>         >>California LA County region.
>>         >>
>>         >>
>>         >>NAD83 UTM Zone 11 meters
>>         >>
>>         >>NAD27 UTM Zone 11 meters
>>         >>
>>         >>What would be your suggested codes? I have tried a few but
>>        can not
>>         >>seem
>>         >>to get it.
>>         >>
>>         >>Thanks
>>         >>Chris
>>         >>
>>         >>
>>         >
>>         >
>>         >
>>
>>
>>        --
>>        Christopher R. Thorne, GIS Specialist
>>        --
>>        3406 Southgate Rd. Ottawa ON K1V 9P9
>>        christhorne at sympatico.ca <mailto:christhorne at sympatico.ca>
>>        Tel:(613)523-6593
> 
> 
> 


-- 
Christopher R. Thorne, GIS Specialist
--
3406 Southgate Rd. Ottawa ON K1V 9P9
christhorne at sympatico.ca
Tel:(613)523-6593

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