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<DIV><FONT face=Arial size=2>Tyler:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks for the prompt response. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>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.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>The specific National Atlas data I'm using is
here:</FONT></DIV>
<DIV><FONT face=Arial size=2><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></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>According to the text file that came with the data
they give the following information about the data:</FONT></DIV>
<DIV><FONT face=Arial size=2> Latitude/Longitude Resolution:
0.000278</FONT></DIV>
<DIV><FONT face=Arial size=2> Geographic Coordinates: Decimal
Degrees</FONT></DIV>
<DIV><FONT face=Arial size=2> Datum: NAD83</FONT></DIV>
<DIV><FONT face=Arial size=2> Ellipsoid: GRS1980</FONT></DIV>
<DIV><FONT face=Arial size=2> Semi-major axis:
6378137</FONT></DIV>
<DIV><FONT face=Arial size=2> Denomiator of Flattening:
298.257222</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>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></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>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).</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>If any of this makes any sense at all let me know
because I feel like I'm rambling! :)</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>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?)</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Here is a copy of my map file:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>MAP<BR>
NAME USA<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</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>
PROJECTION<BR>
"proj=lcc"<BR>
"ellps=GRS80"<BR>
"datum=NAD83"<BR>
# "lat_0=38" #
Latitude CENTER<BR>
# "lat_1=38" #
Set same as lat_0<BR>
# "lon_0=-90" #
Longitude CENTER<BR>
# "x_0=-80000" # Offset
for longitude<BR>
# "y_0=175000" # Offset
for latitude</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial
size=2>
"lat_0=24"<BR>
"lat_1=50"<BR>
"lon_0=-99"<BR>
END<BR><BR>
LAYER<BR>
NAME
"County"<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</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>
LAYER<BR>
NAME
"State"<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</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>
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</FONT></DIV>
<DIV> </DIV><FONT face=Arial size=2>
<DIV><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</DIV>
<DIV></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=tylermitchell@shaw.ca href="mailto:tylermitchell@shaw.ca">Tyler
Mitchell</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=kkoehn@ASPIREDILLUSION.COM
href="mailto:kkoehn@ASPIREDILLUSION.COM">Kelly Koehn</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Cc:</B> <A
title=MAPSERVER-USERS@LISTS.UMN.EDU
href="mailto:MAPSERVER-USERS@LISTS.UMN.EDU">MAPSERVER-USERS@LISTS.UMN.EDU</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, July 24, 2006 10:42
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [SPAM] Re: [UMN_MAPSERVER-USERS]
National Atlas Projections... driving me crazy!</DIV>
<DIV><BR></DIV>Hi Kelly,
<DIV>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. </DIV>
<DIV><BR class=khtml-block-placeholder></DIV>
<DIV>Do you already know the more full description of the LCC projection you
have in mind?</DIV>
<DIV><BR class=khtml-block-placeholder></DIV>
<DIV>Tyler</DIV>
<DIV><BR>
<DIV>
<DIV>On 24-Jul-06, at 6:49 PM, Kelly Koehn wrote:</DIV><BR
class=Apple-interchange-newline>
<BLOCKQUOTE type="cite"><SPAN class=Apple-style-span
style="WORD-SPACING: 0px; FONT: 12px Helvetica; TEXT-TRANSFORM: none; COLOR: rgb(0,0,0); TEXT-INDENT: 0px; WHITE-SPACE: normal; LETTER-SPACING: normal; BORDER-COLLAPSE: separate; border-spacing: 0px 0px; khtml-text-decorations-in-effect: none; apple-text-size-adjust: auto; orphans: 2; widows: 2">
<DIV><FONT face=Arial size=2><SPAN class=Apple-style-span
style="FONT-SIZE: 10px; FONT-FAMILY: Arial">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></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=Apple-style-span
style="FONT-SIZE: 10px; FONT-FAMILY: Arial">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
Kansas) 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></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=Apple-style-span
style="FONT-SIZE: 10px; FONT-FAMILY: Arial">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></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=Apple-style-span
style="FONT-SIZE: 10px; FONT-FAMILY: Arial">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></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=Apple-style-span
style="FONT-SIZE: 10px; FONT-FAMILY: Arial">Any help would be great! I'm
about ready to rip my hair out!</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=Apple-style-span
style="FONT-SIZE: 10px; FONT-FAMILY: Arial">Kelly</SPAN></FONT></DIV>
<DIV> </DIV><BR
class=Apple-interchange-newline></SPAN></BLOCKQUOTE></DIV><BR></DIV></BLOCKQUOTE></BODY></HTML>