<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:st1="urn:schemas-microsoft-com:office:smarttags" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv=Content-Type content="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 11 (filtered medium)">
<!--[if !mso]>
<style>
v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style>
<![endif]--><o:SmartTagType
namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="State"/>
<o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags"
name="PlaceType"/>
<o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags"
name="PlaceName"/>
<o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags"
name="country-region"/>
<o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags"
name="City"/>
<o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags"
name="place"/>
<!--[if !mso]>
<style>
st1\:*{behavior:url(#default#ieooui) }
</style>
<![endif]-->
<style>
<!--
/* Font Definitions */
@font-face
{font-family:Helvetica;
panose-1:2 11 6 4 2 2 2 2 2 4;}
@font-face
{font-family:Wingdings;
panose-1:5 0 0 0 0 0 0 0 0 0;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman";}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:blue;
text-decoration:underline;}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:Arial;
color:navy;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.25in 1.0in 1.25in;}
div.Section1
{page:Section1;}
/* List Definitions */
@list l0
{mso-list-id:1419643210;
mso-list-type:hybrid;
mso-list-template-ids:-1141862702 -1695373238 67698691 67698693 67698689 67698691 67698693 67698689 67698691 67698693;}
@list l0:level1
{mso-level-start-at:0;
mso-level-number-format:bullet;
mso-level-text:-;
mso-level-tab-stop:33.0pt;
mso-level-number-position:left;
margin-left:33.0pt;
text-indent:-.25in;
font-family:Arial;
mso-fareast-font-family:"Times New Roman";}
ol
{margin-bottom:0in;}
ul
{margin-bottom:0in;}
-->
</style>
<!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body bgcolor=white lang=EN-US link=blue vlink=blue style='WORD-WRAP: break-word;
khtml-nbsp-mode: space;khtml-line-break: after-white-space'>
<div class=Section1>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Kelly et al. –<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>There are two different things going on
here, and some of the advice is a little confusing.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Your National Atlas data sets are
distributed as shapefiles using geographic (lat/lon) coordinates on the NAD83
datum. This is not a “projection” – these are
unprojected geodetic coordinates. That’s good. You can use
any projection you like to project this data on to a flat surface and use it on
a map. You can even (as some users do) use a “geographic projection”
and simply leave out the PROJECTION block at the top level of your map
file. This will end up treating latitude and longitude as X/Y planar
coordinates. It will give you a map that is useless for many
applications, but it seems to be a popular way to make bad maps on the Web.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>You don’t “have” to use
LCC, and the National Atlas data isn’t “intended for” LCC or
any other projection. You can choose whatever projection you like –
there are lots of different map projections in the world because they all have
limitations and you can choose the one best suited for your application.
The Mercator projection you mention distorts areas, distances, and directions,
but it shows lines of constant compass declination as straight lines, so if you’re
navigating a ship with a compass that’s an excellent application to
choose. If that’s not what you’re doing there are other
projections that are probably better choices.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>The Mercator projection is so commonplace,
however, that many users think that’s “how things are supposed to
look”. For example, your county is not square – it’s a
rectangle (with the top left corner cut out). <st1:place w:st="on"><st1:PlaceName
w:st="on">Sedgwick</st1:PlaceName> <st1:PlaceType w:st="on">County</st1:PlaceType></st1:place>
is five townships tall and six townships wide, so it’s wider than it is
tall. But the Mercator projection stretches things vertically as you move
away from the Equator, so a Mercator projection of <st1:place w:st="on"><st1:PlaceName
w:st="on">Sedgwick</st1:PlaceName> <st1:PlaceType w:st="on">County</st1:PlaceType></st1:place>
probably looks square. But it’s not, and that’s not the “right”
answer any more or less than any other projection.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>We can all help you choose a good output
projection for your map, but you’ll need to tell us something about what
you want that projection to show. How large an area do you need to
display at once? Do you need to show distances accurately, or areas
accurately?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-left:33.0pt;text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'><span style='mso-list:Ignore'>-<font size=1 face="Times New Roman"><span
style='font:7.0pt "Times New Roman"'>
</span></font></span></span></font><![endif]><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy'>Ed<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Ed McNierney<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>TopoZone.com<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> UMN MapServer
Users List [mailto:MAPSERVER-USERS@LISTS.UMN.EDU] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Kelly Koehn<br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, July 25, 2006 12:22
AM<br>
<b><span style='font-weight:bold'>To:</span></b> MAPSERVER-USERS@LISTS.UMN.EDU<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [UMN_MAPSERVER-USERS]
[SPAM] Re: [UMN_MAPSERVER-USERS] National Atlas Projections... driving me
crazy!</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><st1:City w:st="on"><st1:place w:st="on"><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'>Tyler</span></font></st1:place></st1:City><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>:</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Thanks for the prompt response. </span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>LCC may be the incorrect projection that I need to use but
it seems to be the only projection that I can find that gives me the counties
in the correct (porportional sp?) size. In the end I would really like to
use a Mercator projection but alas I couldn't find any examples to figure out
how to make it work.</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The specific National Atlas data I'm using is here:</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><a
href="http://edcftp.cr.usgs.gov/pub/data/nationalatlas/countyp020.tar.gz">http://edcftp.cr.usgs.gov/pub/data/nationalatlas/countyp020.tar.gz</a></span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>According to the text file that came with the data they give
the following information about the data:</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> Latitude/Longitude Resolution: 0.000278</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> Geographic Coordinates: Decimal Degrees</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> Datum: NAD83</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> Ellipsoid: GRS1980</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> Semi-major axis: 6378137</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> Denomiator of Flattening: 298.257222</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Like I said, so far I've been able to get it to produce a
map in LCC but its only because I've been playing around with the settings to
'make' it work. There is a sample map available here: <a
href="http://www.aspiredillusion.com/cgi-bin/mapserv?map=fmfinder.map&mode=map">http://www.aspiredillusion.com/cgi-bin/mapserv?map=fmfinder.map&mode=map</a></span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>In the end my goal is to be able to specify a specific
latitude/longitude as a center and be able to plot out so many degrees, miles,
whatever out to make a complete map for another project (hence why I think the
Mercator projection would be best).</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>If any of this makes any sense at all let me know because I
feel like I'm rambling! :)</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>By the way... another person suggested to use the EPSG
codes... unfortunately my installation is not too happy with using those.
It keeps giving me a Proj.4 error basically saying it can't find the file even
though they are located in /usr/local/share/proj. For now I've just
substituted in the definition (or is this bad?)</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Here is a copy of my map file:</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>MAP<br>
NAME <st1:country-region w:st="on"><st1:place
w:st="on">USA</st1:place></st1:country-region><br>
STATUS ON<br>
IMAGETYPE PNG<br>
SIZE 400 400<br>
IMAGECOLOR 255 255 255<br>
SHAPEPATH
"/home/aspiredillusion/cgi-bin/gis"<br>
SYMBOLSET "symbol.ref"<br>
FONTSET "font.ref"<br>
extent 2086624.47 2893493.42
2267537.24 3111554.05<br>
UNITS METERS</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> PROJECTION<br>
"proj=lcc"<br>
"ellps=GRS80"<br>
"datum=NAD83"<br>
#
"lat_0=38" # <st1:place w:st="on"><st1:PlaceName
w:st="on">Latitude</st1:PlaceName> <st1:PlaceType w:st="on">CENTER</st1:PlaceType></st1:place><br>
#
"lat_1=38" # Set same as lat_0<br>
#
"lon_0=-90" # <st1:place w:st="on"><st1:PlaceName
w:st="on">Longitude</st1:PlaceName> <st1:PlaceType w:st="on">CENTER</st1:PlaceType></st1:place><br>
# "x_0=-80000"
# Offset for longitude<br>
# "y_0=175000"
# Offset for latitude</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>
"lat_0=24"<br>
"lat_1=50"<br>
"lon_0=-99"<br>
END<br>
<br>
LAYER<br>
<st1:place w:st="on"><st1:PlaceName w:st="on">NAME</st1:PlaceName> <st1:PlaceName
w:st="on">"</st1:PlaceName><st1:PlaceType w:st="on">County</st1:PlaceType><st1:PlaceName
w:st="on">"</st1:PlaceName></st1:place><br>
DATA "countyp020"<br>
TYPE LINE<br>
STATUS DEFAULT<br>
PROJECTION<br>
"proj=latlong"<br>
"ellps=GRS80"<br>
"datum=NAD83"<br>
END<br>
CLASS<br>
OUTLINECOLOR 255 0 0<br>
END<br>
END</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> LAYER<br>
<st1:place w:st="on"><st1:PlaceName w:st="on">NAME</st1:PlaceName> <st1:PlaceName
w:st="on">"</st1:PlaceName><st1:PlaceType w:st="on">State</st1:PlaceType><st1:PlaceName
w:st="on">"</st1:PlaceName></st1:place><br>
DATA "statesp020"<br>
TYPE LINE<br>
STATUS DEFAULT<br>
PROJECTION<br>
"proj=latlong"<br>
"ellps=GRS80"<br>
"datum=NAD83"<br>
END<br>
CLASS<br>
COLOR 0 0 0<br>
END<br>
END</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> LAYER<br>
NAME "pop_pnt"<br>
DATA "pop_pnt"<br>
TYPE POINT<br>
STATUS DEFAULT<br>
LABELITEM "NAME"<br>
PROJECTION<br>
"proj=latlong"<br>
"ellps=GRS80"<br>
"datum=NAD83"<br>
END<br>
CLASS<br>
STYLE<br>
SYMBOL "circle"<br>
SIZE 3<br>
COLOR 0 0 0<br>
END<br>
LABEL<br>
COLOR 0 0 0<br>
FONT "arial"<br>
SIZE 10<br>
TYPE TRUETYPE<br>
POSITION AUTO<br>
OUTLINECOLOR 255 255 255<br>
BUFFER 8<br>
END<br>
END<br>
END</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><br>
LAYER<br>
NAME "Notation"<br>
STATUS DEFAULT<br>
TRANSFORM FALSE<br>
TYPE ANNOTATION<br>
FEATURE<br>
POINTS<br>
33 390 # Across, Down<br>
END<br>
TEXT 'FMFinder'<br>
END<br>
CLASS<br>
LABEL<br>
FONT "arial"<br>
TYPE TRUETYPE<br>
SIZE 10<br>
BUFFER 1<br>
COLOR 0 128 255<br>
FORCE TRUE<br>
BACKGROUNDCOLOR 255 255 255<br>
END<br>
END<br>
END<br>
END<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<blockquote style='border:none;border-left:solid black 1.5pt;padding:0in 0in 0in 4.0pt;
margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'>
<div>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>----- Original Message ----- <o:p></o:p></span></font></p>
</div>
<div style='font-color:black'>
<p class=MsoNormal style='background:#E4E4E4'><b><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial;font-weight:bold'>From:</span></font></b><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> <a
href="mailto:tylermitchell@shaw.ca" title="tylermitchell@shaw.ca">Tyler
Mitchell</a> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>To:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> <a
href="mailto:kkoehn@ASPIREDILLUSION.COM" title="kkoehn@ASPIREDILLUSION.COM">Kelly
Koehn</a> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>Cc:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> <a
href="mailto:MAPSERVER-USERS@LISTS.UMN.EDU"
title="MAPSERVER-USERS@LISTS.UMN.EDU">MAPSERVER-USERS@LISTS.UMN.EDU</a> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>Sent:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> Monday, July 24,
2006 10:42 PM<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial;font-weight:bold'>Subject:</span></font></b><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> [SPAM] Re: [UMN_MAPSERVER-USERS]
National Atlas Projections... driving me crazy!<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Hi Kelly, <o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>I'm not familiar with your national atlas specific projections, but do
you have more details about the LCC projection you are referring to? LCC
is a general class of projection that will have some more localised parameters
depending on, generally speaking, where you are centering your map. The
lat_0/1/2 and lon_0 values might change depending on where you are doing your
mapping. <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Do you already know the more full description of the LCC projection you
have in mind?<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><st1:City w:st="on"><st1:place w:st="on"><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>Tyler</span></font></st1:place></st1:City><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>On 24-Jul-06, at 6:49 PM, Kelly Koehn wrote:<o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
<br>
<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><span class=apple-style-span><font size=1 color=black
face=Arial><span style='font-size:7.5pt;font-family:Arial;color:black'><span
style='border-spacing: 0px 0px;khtml-text-decorations-in-effect: none;
apple-text-size-adjust: auto;orphans: 2;widows: 2;word-spacing:0px'>I've been
working with mapserver for quite some time now and I thought I'd made some
strides in the areas of projections but I seem to have went into it all
backwards. I started out with the National Atlas datasets for counties
and states. I've come to the conclusion that the projection they want you
to use is 'latlong', ellps is 'GRS80', and datum is 'NAD83'. The names
are 'statesp020' and 'countyp020' I believe.</span></font></span><font size=1
color=black face=Helvetica><span style='font-size:9.0pt;font-family:Helvetica;
color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=1 color=black face=Helvetica><span
style='font-size:9.0pt;font-family:Helvetica;color:black'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><span class=apple-style-span><font size=1 color=black
face=Arial><span style='font-size:7.5pt;font-family:Arial;color:black'>This is
all fine and dandy except unless you project the map as LCC it seems to be
vertically challenged. For instance, the county that I live in (Sedgwick,
in <st1:State w:st="on"><st1:place w:st="on">Kansas</st1:place></st1:State>) is
not a rectangle.. its square. I've found some examples of the lat/long to
LCC projection but most seem a bit foggy.</span></font></span><font size=1
color=black face=Helvetica><span style='font-size:9.0pt;font-family:Helvetica;
color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=1 color=black face=Helvetica><span
style='font-size:9.0pt;font-family:Helvetica;color:black'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><span class=apple-style-span><font size=1 color=black
face=Arial><span style='font-size:7.5pt;font-family:Arial;color:black'>My real
question has to do with the whole 'lat/long to meters' conversion and how to
make heads or tails of the 'cs2cs' program that supposedly converts the
values. Is there some magic trick to this program that I'm
not finding? </span></font></span><font size=1 color=black face=Helvetica><span
style='font-size:9.0pt;font-family:Helvetica;color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=1 color=black face=Helvetica><span
style='font-size:9.0pt;font-family:Helvetica;color:black'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><span class=apple-style-span><font size=1 color=black
face=Arial><span style='font-size:7.5pt;font-family:Arial;color:black'>I have
some other questions about exactly what the lat_0, lat_1, lat_2, lon_0 values
should be for the LCC projection but I'll save those for another time.</span></font></span><font
size=1 color=black face=Helvetica><span style='font-size:9.0pt;font-family:
Helvetica;color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=1 color=black face=Helvetica><span
style='font-size:9.0pt;font-family:Helvetica;color:black'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><span class=apple-style-span><font size=1 color=black
face=Arial><span style='font-size:7.5pt;font-family:Arial;color:black'>Any help
would be great! I'm about ready to rip my hair out!</span></font></span><font
size=1 color=black face=Helvetica><span style='font-size:9.0pt;font-family:
Helvetica;color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=1 color=black face=Helvetica><span
style='font-size:9.0pt;font-family:Helvetica;color:black'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><span class=apple-style-span><font size=1 color=black
face=Arial><span style='font-size:7.5pt;font-family:Arial;color:black'>Kelly</span></font></span><font
size=1 color=black face=Helvetica><span style='font-size:9.0pt;font-family:
Helvetica;color:black'><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=1 color=black face=Helvetica><span
style='font-size:9.0pt;font-family:Helvetica;color:black'> <o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=1 color=black face=Helvetica><span
style='font-size:9.0pt;font-family:Helvetica;color:black'><br>
<br>
</span></font><o:p></o:p></p>
</div>
</span>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
</blockquote>
</div>
</body>
</html>