[Mapserver-users] raster layer
nida Khan
nida at webstar.co.uk
Tue Dec 3 06:24:02 EST 2002
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Thank you so much Ed and THE list,
Ed you r a *, great!
I can c the map now , will play around with X and Y axis to suit our =
need! :).
btw is there anyone using mapserver in UK with ordnancesurvey data??
just curious what conversion tools u r using, and what's happening =
outside my office :)
Kind Regards
Nida.
----- Original Message -----=20
From: Ed McNierney=20
To: nida Khan ; mapserver-users at lists.gis.umn.edu=20
Sent: Monday, December 02, 2002 6:29 PM
Subject: RE: [Mapserver-users] raster layer
Nida -
Your EXTENT line:
EXTENT 127000.0 160000.0 530000.0 185000.0
says "use a minimum X of 127000, a minimum Y of 160000, a maximum X of =
530000, and a maximum Y of 185000". However, the upper-left corner of =
your image is at X =3D 530000, Y =3D 185000. This means that the entire =
image data lies just to the right of the area you're viewing, so you'll =
get no map. Try changing the line to:
EXTENT 530000.0 160000.0 555000.0 185000.0
and see what you get. I can't tell how large your image is, but this =
should make SOMETHING visible in the upper-left corner of the map image. =
The extents for a map image are normally provided as FORM variables, so =
you can control the area mapped interactively.
- Ed
-----Original Message-----
From: nida Khan [mailto:nida at webstar.co.uk]
Sent: Monday, December 02, 2002 11:48 AM
To: Ed McNierney
Subject: Re: [Mapserver-users] raster layer
Hi ,
this is what it contains
0.635
0
0
-0.635
530000
185000
Nida.
----- Original Message -----=20
From: Ed McNierney=20
To: nida Khan=20
Sent: Monday, December 02, 2002 3:57 PM
Subject: RE: [Mapserver-users] raster layer
Nida -
What are the contents of your world (TFW) file?
- Ed
-----Original Message-----
From: nida Khan [mailto:nida at webstar.co.uk]
Sent: Monday, December 02, 2002 10:30 AM
To: Ed McNierney
Subject: Re: [Mapserver-users] raster layer
Hi Again,
Once again thank you so much for your help!.
There r files in the tmp directory alright, I can c scalebar =
fine, I tried to view the image outside the mapserver as well, but still =
it prints it as blank.
" If you're really retrieving files but they're blank images, =
then your data doesn't intersect the map image requested."
ok, I've got only one layer in the map file for that raster =
image, got .tif and .tfw file in my raster directory
changed the extents as mentioned in last email.
whats next?
Me lost in GIS world
Nida.
Nida -
I'm not really sure what that information means, but you need =
to figure out which of these three things is happening:
1. MapServer is creating and your browser is displaying a =
perfectly valid image that is blank.
2. MapServer is creating an image in the IMAGEPATH directory =
but your browser can't retrieve it.
3. MapServer cannot create an image in the IMAGEPATH =
directory.
These are three different problems with three different fixes. =
You should check the IMAGEPATH directory after trying to display the =
map a few times - you should see more temporary image files being =
created there. If they're not being created, then your MapServer setup =
doesn't have permission to write to that directory. If the files are =
created but you can't retrieve them in your browser, then your Web site =
doesn't have access to those files. If you're really retrieving files =
but they're blank images, then your data doesn't intersect the map image =
requested.
- Ed
-----Original Message-----
From: nida Khan [mailto:nida at webstar.co.uk]
Sent: Monday, December 02, 2002 9:09 AM
To: Ed McNierney
Subject: Re: [Mapserver-users] raster layer
Thank you so much for your reply!
I right clicked on that blank image, and it does not look =
like a image to me,
protocol=3Dhyper text
type=3Dhtml document
address=3D"full address at time of init."
size=3D2460
I changed the extents before I did this, nothing make any =
diffrence
here is my content of map file
NAME WALES
#EXTENT 127000.0 160000.0 380000.0 402000.0
EXTENT 127000.0 160000.0 530000.0 185000.0
SIZE 400 400
FONTSET "/var/www/html/application/fonts/fonts.list"
SHAPEPATH "/var/www/html/application/"
UNITS KILOMETERS
=20
WEB
TEMPLATE wales2.html
IMAGEPATH "/var/www/html/application/tmp/"
IMAGEURL "/application/tmp/"
END
QUERYMAP
SIZE 200 200
STATUS ON
STYLE HILITE =20
COLOR 255 0 0
END
SYMBOL
NAME 'circle'
TYPE ELLIPSE
POINTS 1 1 END
FILLED TRUE
END
=20
LAYER
# NAME "Layer_CIB"
NAME "wales_boundary"=20
DATA "raster/tq38sw.tif"
TYPE RASTER =20
STATUS DEFAULT
OFFSITE 0
END
END # end of map file
I have .tif and .tfw file in my raster directory!
Really appreciate your help!
Regards
Nida. =20
----- Original Message -----=20
From: Ed McNierney=20
To: nida Khan=20
Sent: Monday, December 02, 2002 1:53 PM
Subject: RE: [Mapserver-users] raster layer
Nida -
If you are getting a blank image (not a MISSING image, but =
a real, valid image that is blank) that means that the data you have do =
not overlap the extents requested for the map. Look at the EXTENTS line =
in your map file; the numbers should be similar to the last two lines in =
the TFW file.
- Ed
Ed McNierney
President and Chief Mapmaker
TopoZone.com / Maps a la carte, Inc.
73 Princeton Street, Suite 305
North Chelmsford, MA 01863
ed at topozone.com
(978) 251-4242=20
-----Original Message-----
From: nida Khan [mailto:nida at webstar.co.uk]
Sent: Monday, December 02, 2002 6:25 AM
To: nida Khan; mapserver-users at lists.gis.umn.edu
Subject: Re: [Mapserver-users] raster layer
I have downloaded a big zip file, whith all the .twf =
files.
Now I have copied the related twf file in the same =
directory and yapee, not gettting that error any more, instead a blank =
image is coming up :(. (anyone have any idea what might be the issue =
this time)
thats something new to explore!
Thank you very much every for your helpful replies
Regards
Nida.
----- Original Message -----=20
From: nida Khan=20
To: mapserver-users at lists.gis.umn.edu=20
Sent: Monday, December 02, 2002 10:46 AM
Subject: [Mapserver-users] raster layer
ok... I am very much confuse here, I've got only .tif =
file from
ordnancesurvey website. There is no download avaliable =
for twf file!!!!
Where do I get twf file???
Regards
Nida.
----- Original Message -----
From: "Hankley, Chip" <Chip.Hankley at GASAI.Com>
To: "'nida Khan'" <nida at webstar.co.uk>
Cc: "MapServer List (E-mail)" =
<mapserver-users at lists.gis.umn.edu>
Sent: Friday, November 29, 2002 2:26 PM
Subject: RE: [mapserver-users] raster layer
> Nida,
>
> > it gives me this error
> > readWorldFile(): Unable to access file. Unable to =
open
> > world file for reading.
>
> This indicates to me that your image doesn't have a =
valid world file, or
> that it isn't GeoTif. For the image to display =
correctly, it needs to have
> that. Is there a 'tq38sw.tfw' file in the directory?
>
> Chip
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<META http-equiv=3DContent-Type content=3D"text/html; =
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<BODY bgColor=3D#ffffff>
<DIV><FONT size=3D2>Thank you so much Ed and THE list,</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Ed you r a *, great!</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>I can c the map now , will play around with =
X and Y=20
axis to suit our need! :).</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>btw is there anyone using mapserver in UK with=20
ordnancesurvey data??</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>just curious what conversion tools u r using, and =
what's=20
happening outside my office :)</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Kind Regards</FONT></DIV>
<DIV><FONT size=3D2>Nida.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV> ----- Original Message ----- </DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3Ded at topozone.com href=3D"mailto:ed at topozone.com">Ed =
McNierney</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dnida at webstar.co.uk=20
href=3D"mailto:nida at webstar.co.uk">nida Khan</A> ; <A=20
title=3Dmapserver-users at lists.gis.umn.edu=20
=
href=3D"mailto:mapserver-users at lists.gis.umn.edu">mapserver-users at lists.g=
is.umn.edu</A>=20
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Monday, December 02, 2002 =
6:29=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> RE: [Mapserver-users] =
raster=20
layer</DIV>
<DIV><FONT size=3D2></FONT><FONT size=3D2></FONT><FONT =
size=3D2></FONT><BR></DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2>
<DIV><SPAN class=3D700332318-02122002><FONT face=3DArial =
color=3D#0000ff size=3D2>Nida=20
-</FONT></SPAN></DIV>
<DIV><SPAN class=3D700332318-02122002><FONT face=3DArial =
color=3D#000000=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D700332318-02122002><FONT face=3DArial =
color=3D#0000ff size=3D2>Your=20
EXTENT line:</FONT></SPAN></DIV>
<DIV><SPAN class=3D700332318-02122002><FONT face=3DArial =
color=3D#000000=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D700332318-02122002><FONT size=3D2>EXTENT 127000.0 =
160000.0=20
530000.0 185000.0</FONT><BR></SPAN></DIV>
<DIV><SPAN class=3D700332318-02122002><FONT face=3DArial =
color=3D#0000ff size=3D2>says=20
"use a minimum X of 127000, a minimum Y of 160000, a maximum X of =
530000, and=20
a maximum Y of 185000". However, the upper-left corner of your =
image is=20
at X =3D 530000, Y =3D 185000. This means that the entire image =
data lies=20
just to the right of the area you're viewing, so you'll get no =
map. =20
Try changing the line to:</FONT></SPAN></DIV>
<DIV><SPAN class=3D700332318-02122002><FONT face=3DArial =
color=3D#000000=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D700332318-02122002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2><SPAN class=3D700332318-02122002><FONT face=3D"Times New =
Roman"=20
color=3D#000000 size=3D2>EXTENT 530000.0 160000.0 555000.0=20
185000.0</FONT><BR></SPAN></FONT></SPAN></DIV>
<DIV><SPAN class=3D700332318-02122002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2><SPAN class=3D700332318-02122002>and see what you get. =
I can't tell=20
how large your image is, but this should make SOMETHING visible in the =
upper-left corner of the map image. The extents for a map image =
are=20
normally provided as FORM variables, so you can control the area =
mapped=20
interactively.</SPAN></FONT></SPAN></DIV>
<DIV><SPAN class=3D700332318-02122002><FONT face=3DArial =
color=3D#000000=20
size=3D2><SPAN =
class=3D700332318-02122002></SPAN></FONT></SPAN> </DIV>
<DIV><SPAN class=3D700332318-02122002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2><SPAN class=3D700332318-02122002> -=20
Ed</SPAN></FONT></SPAN></DIV></FONT></DIV>
<BLOCKQUOTE dir=3Dltr style=3D"MARGIN-RIGHT: 0px">
<DIV class=3DOutlookMessageHeader dir=3Dltr align=3Dleft><FONT =
face=3DTahoma=20
size=3D2>-----Original Message-----<BR><B>From:</B> nida Khan=20
[mailto:nida at webstar.co.uk]<BR><B>Sent:</B> Monday, December 02, =
2002 11:48=20
AM<BR><B>To:</B> Ed McNierney<BR><B>Subject:</B> Re: =
[Mapserver-users]=20
raster layer<BR><BR></FONT></DIV>
<DIV><FONT size=3D2>Hi ,</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>this is what it contains</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT =
size=3D2>0.635<BR>0<BR>0<BR>-0.635<BR>530000<BR>185000</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Nida.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- =
</DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3Ded at topozone.com href=3D"mailto:ed at topozone.com">Ed =
McNierney</A>=20
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dnida at webstar.co.uk=20
href=3D"mailto:nida at webstar.co.uk">nida Khan</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Monday, December 02, =
2002 3:57=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> RE: =
[Mapserver-users] raster=20
layer</DIV>
<DIV><BR></DIV>
<DIV><SPAN class=3D812255715-02122002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>Nida -</FONT></SPAN></DIV>
<DIV><SPAN class=3D812255715-02122002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D812255715-02122002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>What are the contents of your world (TFW) =
file?</FONT></SPAN></DIV>
<DIV><SPAN class=3D812255715-02122002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D812255715-02122002> <FONT =
face=3DArial=20
color=3D#0000ff size=3D2>- Ed</FONT></SPAN></DIV>
<BLOCKQUOTE dir=3Dltr style=3D"MARGIN-RIGHT: 0px">
<DIV class=3DOutlookMessageHeader dir=3Dltr align=3Dleft><FONT =
face=3DTahoma=20
size=3D2>-----Original Message-----<BR><B>From:</B> nida Khan=20
[mailto:nida at webstar.co.uk]<BR><B>Sent:</B> Monday, December 02, =
2002=20
10:30 AM<BR><B>To:</B> Ed McNierney<BR><B>Subject:</B> Re:=20
[Mapserver-users] raster layer<BR><BR></FONT></DIV>
<DIV><FONT size=3D2>Hi Again,</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Once again thank you so much for your=20
help!.</FONT></DIV><FONT size=3D2></FONT>
<DIV><FONT size=3D2></FONT><BR><FONT size=3D2>There r files in =
the tmp=20
directory alright, I can c scalebar fine, I tried to view the =
image=20
outside the mapserver as well, but still it prints it as=20
blank.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>"<FONT color=3D#0000ff> If you're really =
retrieving=20
files but they're blank images, then your data doesn't intersect =
the map=20
image requested."</FONT></FONT></DIV>
<DIV><FONT color=3D#0000ff size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>ok, I've got only one layer in the map file =
for that=20
raster image, got .tif and .tfw file in my raster =
directory</FONT></DIV>
<DIV><FONT size=3D2>changed the extents as mentioned in last=20
email.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>whats next?</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Me lost in GIS world</FONT></DIV>
<DIV><FONT size=3D2>Nida.</FONT></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: =
5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV><SPAN class=3D673593314-02122002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>Nida -</FONT></SPAN></DIV>
<DIV><SPAN class=3D673593314-02122002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D673593314-02122002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>I'm not really sure what that information means, but =
you need=20
to figure out which of these three things is=20
happening:</FONT></SPAN></DIV>
<DIV><SPAN class=3D673593314-02122002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D673593314-02122002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>1. MapServer is creating and your browser is =
displaying a=20
perfectly valid image that is blank.</FONT></SPAN></DIV>
<DIV><SPAN class=3D673593314-02122002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>2. MapServer is creating an image in the IMAGEPATH =
directory=20
but your browser can't retrieve it.</FONT></SPAN></DIV>
<DIV><SPAN class=3D673593314-02122002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>3. MapServer cannot create an image in the IMAGEPATH=20
directory.</FONT></SPAN></DIV>
<DIV><SPAN class=3D673593314-02122002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D673593314-02122002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>These are three different problems with three =
different=20
fixes. You should check the IMAGEPATH directory after =
trying to=20
display the map a few times - you should see more temporary =
image=20
files being created there. If they're not being created, =
then=20
your MapServer setup doesn't have permission to write to that=20
directory. If the files are created but you can't =
retrieve them=20
in your browser, then your Web site doesn't have access to =
those=20
files. If you're really retrieving files but they're =
blank=20
images, then your data doesn't intersect the map image=20
requested.</FONT></SPAN></DIV>
<DIV><SPAN class=3D673593314-02122002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D673593314-02122002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2> - Ed</FONT></SPAN></DIV>
<BLOCKQUOTE dir=3Dltr style=3D"MARGIN-RIGHT: 0px">
<DIV class=3DOutlookMessageHeader dir=3Dltr =
align=3Dleft><FONT face=3DTahoma=20
size=3D2>-----Original Message-----<BR><B>From:</B> nida =
Khan=20
[mailto:nida at webstar.co.uk]<BR><B>Sent:</B> Monday, December =
02,=20
2002 9:09 AM<BR><B>To:</B> Ed McNierney<BR><B>Subject:</B> =
Re:=20
[Mapserver-users] raster layer<BR><BR></FONT></DIV>
<DIV><FONT size=3D2>Thank you so much for your =
reply!</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>I right clicked on that blank image, and =
it does=20
not look like a image to me,</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>protocol=3Dhyper text</FONT></DIV>
<DIV><FONT size=3D2>type=3Dhtml document</FONT></DIV>
<DIV><FONT size=3D2>address=3D"full address at time of=20
init."</FONT></DIV>
<DIV><FONT size=3D2>size=3D2460</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>I changed the extents before I did this, =
nothing=20
make any diffrence</FONT></DIV>
<DIV><FONT size=3D2>here is my content of map =
file</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>NAME WALES<BR>#EXTENT 127000.0 160000.0 =
380000.0=20
402000.0<BR>EXTENT 127000.0 160000.0 530000.0 =
185000.0<BR>SIZE 400=20
400<BR>FONTSET=20
"/var/www/html/application/fonts/fonts.list"<BR>SHAPEPATH=20
"/var/www/html/application/"<BR>UNITS=20
KILOMETERS<BR> <BR>WEB<BR> TEMPLATE=20
wales2.html<BR> IMAGEPATH=20
"/var/www/html/application/tmp/"<BR> IMAGEURL=20
"/application/tmp/"<BR>END</FONT></DIV>
<DIV><FONT size=3D2><BR>QUERYMAP<BR> SIZE 200 =
200<BR> =20
STATUS ON<BR> STYLE HILITE <BR> COLOR 255 =
0=20
0<BR>END</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>SYMBOL<BR> NAME 'circle'<BR> =
TYPE=20
ELLIPSE<BR> POINTS 1 1 END<BR> FILLED=20
TRUE<BR>END<BR> <BR>LAYER<BR> # NAME=20
"Layer_CIB"<BR> NAME "wales_boundary" <BR> DATA=20
"raster/tq38sw.tif"<BR> TYPE RASTER =
<BR> =20
STATUS DEFAULT<BR> OFFSITE 0<BR>END</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>END # end of map file<BR></FONT></DIV>
<DIV><FONT size=3D2>I have .tif and .tfw file in my raster=20
directory!</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Really appreciate your =
help!</FONT></DIV>
<DIV><FONT size=3D2>Regards</FONT></DIV>
<DIV><FONT size=3D2>Nida. </FONT></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: =
5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message =
----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; =
font-color: black"><B>From:</B>=20
<A title=3Ded at topozone.com =
href=3D"mailto:ed at topozone.com">Ed=20
McNierney</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A=20
title=3Dnida at webstar.co.uk =
href=3D"mailto:nida at webstar.co.uk">nida=20
Khan</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Monday, =
December 02,=20
2002 1:53 PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> RE:=20
[Mapserver-users] raster layer</DIV>
<DIV><BR></DIV>
<DIV><SPAN class=3D634595213-02122002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>Nida -</FONT></SPAN></DIV>
<DIV><SPAN class=3D634595213-02122002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D634595213-02122002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2>If you are getting a blank image (not a MISSING =
image, but=20
a real, valid image that is blank) that means that the =
data you=20
have do not overlap the extents requested for the =
map. Look=20
at the EXTENTS line in your map file; the numbers should =
be=20
similar to the last two lines in the TFW =
file.</FONT></SPAN></DIV>
<DIV><SPAN class=3D634595213-02122002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D634595213-02122002> =
<FONT=20
face=3DArial color=3D#0000ff size=3D2>- =
Ed</FONT></SPAN></DIV>
<DIV><SPAN class=3D634595213-02122002><FONT face=3DArial =
color=3D#0000ff=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D634595213-02122002>
<P><FONT size=3D2>Ed McNierney<BR>President and Chief=20
Mapmaker<BR>TopoZone.com / Maps a la carte, Inc.<BR>73 =
Princeton=20
Street, Suite 305<BR>North Chelmsford, MA =20
01863<BR>ed at topozone.com<BR>(978) 251-4242=20
</FONT></P></SPAN></DIV>
<BLOCKQUOTE dir=3Dltr style=3D"MARGIN-RIGHT: 0px">
<DIV class=3DOutlookMessageHeader dir=3Dltr =
align=3Dleft><FONT=20
face=3DTahoma size=3D2>-----Original =
Message-----<BR><B>From:</B>=20
nida Khan [mailto:nida at webstar.co.uk]<BR><B>Sent:</B> =
Monday,=20
December 02, 2002 6:25 AM<BR><B>To:</B> nida Khan;=20
mapserver-users at lists.gis.umn.edu<BR><B>Subject:</B> Re: =
[Mapserver-users] raster layer<BR><BR></FONT></DIV>
<DIV><FONT size=3D2>I have downloaded a big zip file, =
whith all=20
the .twf files.</FONT></DIV>
<DIV><FONT size=3D2>Now I have copied the related twf =
file in the=20
same directory and yapee, not gettting that error any =
more,=20
instead a blank image is coming up :(. (anyone have any =
idea=20
what might be the issue this time)</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>thats something new to =
explore!</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Thank you very much every for your =
helpful=20
replies</FONT></DIV>
<DIV><FONT size=3D2>Regards</FONT></DIV>
<DIV><FONT size=3D2>Nida.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; =
MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message =
-----=20
</DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; =
font-color: black"><B>From:</B>=20
<A title=3Dnida at webstar.co.uk=20
href=3D"mailto:nida at webstar.co.uk">nida Khan</A> =
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A=20
title=3Dmapserver-users at lists.gis.umn.edu=20
=
href=3D"mailto:mapserver-users at lists.gis.umn.edu">mapserver-users at lists.g=
is.umn.edu</A>=20
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Monday, =
December=20
02, 2002 10:46 AM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B>=20
[Mapserver-users] raster layer</DIV>
<DIV><FONT size=3D2></FONT><BR></DIV>
<DIV><FONT size=3D2><FONT size=3D3>ok... I am very =
much confuse=20
here, I've got only .tif file from<BR>ordnancesurvey =
website.=20
There is no download avaliable for twf =
file!!!!<BR><BR>Where=20
do I get twf =
file???<BR><BR>Regards<BR>Nida.<BR><BR>-----=20
Original Message -----<BR>From: "Hankley, Chip" =
<</FONT><A=20
href=3D"mailto:Chip.Hankley at GASAI.Com"><FONT=20
size=3D3>Chip.Hankley at GASAI.Com</FONT></A><FONT=20
size=3D3>><BR>To: "'nida Khan'" <</FONT><A=20
href=3D"mailto:nida at webstar.co.uk"><FONT=20
size=3D3>nida at webstar.co.uk</FONT></A><FONT =
size=3D3>><BR>Cc:=20
"MapServer List (E-mail)" <</FONT><A=20
=
href=3D"mailto:mapserver-users at lists.gis.umn.edu"><FONT=20
=
size=3D3>mapserver-users at lists.gis.umn.edu</FONT></A><FONT=20
size=3D3>><BR>Sent: Friday, November 29, 2002 2:26=20
PM<BR>Subject: RE: [mapserver-users] raster=20
layer<BR><BR><BR>> Nida,<BR>><BR>> > it =
gives me=20
this error<BR>> > readWorldFile(): Unable =
to=20
access file. Unable to open<BR>> > world =
file for=20
reading.<BR>><BR>> This indicates to me that =
your image=20
doesn't have a valid world file, or<BR>> that it =
isn't=20
GeoTif. For the image to display correctly, it needs =
to=20
have<BR>> that. Is there a 'tq38sw.tfw' file in the =
directory?<BR>><BR>>=20
=
Chip</FONT><BR></FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BLOC=
KQUOTE></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE><=
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