[mapserver-users] HTML Legend with Status Checking...
Martin, Daniel
DMartin@erac.com
Tue, 1 Oct 2002 14:33:50 -0500
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Could you provide the map file definition for the Parima Survey Households
layer?
Thanks,
Dan
-----Original Message-----
From: Mike Smith [mailto:nospam@cnrit.tamu.edu]
Sent: Tuesday, October 01, 2002 11:56 AM
To: Martin, Daniel
Cc: mapserver-users@lists.gis.umn.edu
Subject: Re: [mapserver-users] HTML Legend with Status Checking...
Same thing. Now I don't have group header bars seperating my layers, but
all the layers still show up and when I click on a layer that has
scale-specific classes, the symbols for all scales still show up. By the
way, I'm on Mapserver 3.6.1 and here's the page to go to if you want to see
what I'm talking about:
http://cnrit.tamu.edu/maps/map_init.html
<http://cnrit.tamu.edu/maps/map_init.html>
Click on the very last button on that page (the one that says "FRAMES
VERSION" on it). When the map shows up, expand the "Regional" folder on the
left-hand side to display those layers. The one that I'm working on right
now is called "Parima Survey Households". Click on that layer to load it
into the map, then you'll see the various symbols I'm referring to show up
in the legend. I represent the Parima households with red triangle symbols
and I have different sized triangles depending on how far zoomed in you are
so that they are small at a high scale and larger as you zoom in...but I
don't want all versions of that symbol to show up in my legend all the
time...just the one that's in scale.
Thanks again!
Martin, Daniel wrote:
Try this. Take out the leg_group_html section, and the leg_layer_html
section, leaving only the leg_class_html section. Take them out entirely -
don't leave an empty set of tags. Then, let me know what happens.
-Dan
-----Original Message-----
From: Mike Smith [ mailto:nospam@cnrit.tamu.edu
<mailto:nospam@cnrit.tamu.edu> ]
Sent: Tuesday, October 01, 2002 11:33 AM
To: Martin, Daniel
Cc: mapserver-users@lists.gis.umn.edu
<mailto:mapserver-users@lists.gis.umn.edu>
Subject: Re: [mapserver-users] HTML Legend with Status Checking...
Gladly. Here is my legend code:
[leg_group_html]
<tr>
<td colspan=3 bgcolor=#cccccc><b>[leg_group_name]</b></td>
</tr>
[/leg_group_html]
[leg_layer_html]
[/leg_layer_html]
[leg_class_html]
<tr>
<td width=15> </td>
<td>
<img src="[leg_icon width=15 height=15]" width=15 height=15>
</td>
<td>
[leg_class_name]
</td>
</tr>
[/leg_class_html]
However, it does not work as you say (and as the documentation on the web
page says!). Layers that are "off" do not show up (that's as expected and
what I want), that's fine, but layers that are out of SCALE DO show up, and
that's not as expected and that's not as the documentation states and that's
NOT what I want. For example, I have a layer called
Ethiopia_Rivers...here's what it looks like:
LAYER
NAME "Ethiopia_Rivers"
TYPE LINE
STATUS off
GROUP Ethiopia
DATA "ethiopia_rivers"
HEADER 'ethiopia_rivers.shp_header.html'
CLASS
MAXSCALE 8710165
Name 'Ethiopia Rivers'
COLOR 102 204 255
TEMPLATE ethiopia_rivers.shp_query.html
END # CLASS
END # LAYER
Now, when I'm viewing my map at full extent, my scale factor is 1: 20136789,
therefore if I click on the Ethiopia_Rivers layer at that zoom level,
nothing shows up in the map. This is the exact behavior that I would
expect...I'm out of scale for that layer, so it doesn't show up in the map
until I zoom in. The PROBLEM, however, is that the "Ethiopia Rivers" icon
and label pop up in my legend...this is counter-intuitive, contrary to the
documented behavior of Mapserver, and just flat-out frustrating! If the
layer is not showing up in my map (because it's out of scale), then it
should NOT be in my legend either. Grrrr!!! Pardon me for sounding
bitter...I'm not lashing out at you, I'm very grateful for your help, I'm
just frustrated at Mapserver.
Thanks!
Martin, Daniel wrote:
Perhaps I misunderstood. By default (no opt_flag set) layers that are out
of scale and layers that have a STATUS off will not show in an HTML legend.
A legend exactly like this should do exactly what it sounds like you want:
[leg_class_html]
<TR>
<TD>
<img src="[leg_icon]" border=0>
</TD>
<TD>
<font face="arial" size=2>[leg_class_name]</font>
</TD>
</TR>
[/leg_class_html]
I'm not sure why you are having trouble getting the default action. Perhaps
you could provide your current legend.
-Dan
-----Original Message-----
From: Mike Smith [ mailto:nospam@cnrit.tamu.edu
<mailto:nospam@cnrit.tamu.edu> ]
Sent: Tuesday, October 01, 2002 10:59 AM
To: Martin, Daniel
Cc: mapserver-users@li! <mailto:mapserver-users@lists.gis.umn.edu>
sts.gis.u
mn.edu
Subject: Re: [mapserver-users] HTML Legend with Status Checking...
Thank you, but this didn't change a thing. Actually, let me correct
that...it had a negative effect because now all my layers show up too,
even if they are not displayed in the map. I want only active layers to
show in the legend and I want only IN-SCALE class symbols to show up in
the legend, I don't want 4 symbols to show up in the legend for every
layer that I have which has scale-specific classes...I just don't guess
I can do that without converting everything over to Mapscript. X-(
Any other ideas?
Martin, Daniel wrote:
You probably want a bit mask of 2 in your opt_flag. Layers with STATUS off
still show, but layers out of scale don't show.
[leg_layer_html opt_flag=2]
Per http://mapserver.gis.umn.edu/doc36/html-legend-howto.html
<http://mapserver.gis.umn.edu/doc36/html-legend-howto.html> :
1: If set, show layer even if out of scale (default: hide layers out of
scale).
2: If set, show layer even if status is OFF (default: hide layers with
STATUS OFF).
4: If set, show layer even if type is QUERY (default: hide layers of TYPE
QUERY)
8: If set, show layer even if type is ANNOTATION (default: hide layers of
TYPE ANNOTATION)
In my experience, opt_flag=2 is the most intuitive.
-Dan
-----Original Message-----
From: Mike Smith [ mailto:nospam@cnrit.tamu! <mailto:nospam@cnrit.tamu.edu>
.edu]
Sent: Mo
nday, September 30, 2002 5:06 PM
To: mapserver-users@lists.gis.umn.edu
<mailto:mapserver-users@lists.gis.umn.edu>
Subject: [mapserver-users] HTML Legend with Status Checking...
Hello,
I've seen how you can make legends using PHP Mapscript that check to
see whether a layer or class is in scale before displaying it in the
legend, but no mention of how to do this if I'm not using Mapscript. I
have sub-classed many of my layers so that symbols show up in different
sizes depending on how far zoomed in you are. In other words, I'm using
"MINSCALE" and "MAXSCALE" in my classes, but all of my classes show up
in the legend and that's really annoying! I want ONLY the in-scale
symbol to show up in the legend as it does in the map...any tips on how
to do this without Mapscript? I see the "if" conditional statements in
the HTML Legend How-to, but there's no status o
f "SCALE" to
check with
those statements... if I could put an if statement in my legend template
that checked whether or not a class or layer was in scale, then I'd be
in business...any way to do this?
Thanks!
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<DIV><SPAN class=692135717-01102002><FONT face=Arial color=#0000ff size=2>Could
you provide the map file definition for the Parima Survey Households
layer?</FONT></SPAN></DIV>
<DIV><SPAN class=692135717-01102002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=692135717-01102002><FONT face=Arial color=#0000ff
size=2>Thanks,</FONT></SPAN></DIV>
<DIV><SPAN class=692135717-01102002><FONT face=Arial color=#0000ff
size=2>Dan</FONT></SPAN></DIV>
<BLOCKQUOTE>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> Mike Smith
[mailto:nospam@cnrit.tamu.edu]<BR><B>Sent:</B> Tuesday, October 01, 2002 11:56
AM<BR><B>To:</B> Martin, Daniel<BR><B>Cc:</B>
mapserver-users@lists.gis.umn.edu<BR><B>Subject:</B> Re: [mapserver-users]
HTML Legend with Status Checking...<BR><BR></FONT></DIV>Same thing. Now
I don't have group header bars seperating my layers, but all the layers still
show up and when I click on a layer that has scale-specific classes, the
symbols for all scales still show up. By the way, I'm on Mapserver 3.6.1
and here's the page to go to if you want to see what I'm talking
about:<BR><BR><A class=moz-txt-link-freetext
href="http://cnrit.tamu.edu/maps/map_init.html">http://cnrit.tamu.edu/maps/map_init.html</A><BR><BR>Click
on the very last button on that page (the one that says "FRAMES VERSION" on
it). When the map shows up, expand the "Regional" folder on the
left-hand side to display those layers. The one that I'm working on
right now is called "Parima Survey Households". Click on that layer to
load it into the map, then you'll see the various symbols I'm referring to
show up in the legend. I represent the Parima households with red
triangle symbols and I have different sized triangles depending on how far
zoomed in you are so that they are small at a high scale and larger as you
zoom in...but I don't want all versions of that symbol to show up in my legend
all the time...just the one that's in scale.<BR><BR>Thanks
again!<BR><BR>Martin, Daniel wrote:<BR>
<BLOCKQUOTE
cite="mid:4ACBA1414DD9EE418CC250E4AAA9035A16F347@STL-EXBE-I03.corp.erac.com"
type="cite">
<META content="MSHTML 5.50.4613.1700" name=GENERATOR>
<DIV><SPAN class=328113416-01102002><FONT face=Arial color=#0000ff
size=2>Try this. Take out the leg_group_html section, and the
leg_layer_html section, leaving only the leg_class_html section. Take
them out entirely - don't leave an empty set of tags. Then, let me
know what happens.</FONT></SPAN></DIV>
<DIV><SPAN class=328113416-01102002></SPAN> </DIV>
<DIV><SPAN class=328113416-01102002><FONT face=Arial color=#0000ff
size=2>-Dan</FONT></SPAN></DIV>
<BLOCKQUOTE>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> Mike Smith [<A
class=moz-txt-link-freetext
href="mailto:nospam@cnrit.tamu.edu">mailto:nospam@cnrit.tamu.edu</A>]<BR><B>Sent:</B>
Tuesday, October 01, 2002 11:33 AM<BR><B>To:</B> Martin,
Daniel<BR><B>Cc:</B> <A class=moz-txt-link-abbreviated
href="mailto:mapserver-users@lists.gis.umn.edu">mapserver-users@lists.gis.umn.edu</A><BR><B>Subject:</B>
Re: [mapserver-users] HTML Legend with Status
Checking...<BR><BR></FONT></DIV>Gladly. Here is my legend
code:<BR><BR>[leg_group_html]<BR>
<tr><BR> <td colspan=3
bgcolor=#cccccc><b>[leg_group_name]</b></td><BR>
</tr><BR>[/leg_group_html]<BR><BR>[leg_layer_html]<BR>[/leg_layer_html]<BR><BR>[leg_class_html]<BR>
<tr><BR> <td
width=15>&nbsp;</td><BR>
<td><BR>
<img src="[leg_icon width=15 height=15]" width=15
height=15><BR>
</td><BR>
<td><BR>
[leg_class_name]<BR>
</td><BR> </tr><BR>[/leg_class_html]<BR><BR><BR>However,
it does not work as you say (and as the documentation on the web page
says!). Layers that are "off" do not show up (that's as expected and
what I want), that's fine, but layers that are out of SCALE DO show up,
and that's not as expected and that's not as the documentation states and
that's NOT what I want. For example, I have a layer called
Ethiopia_Rivers...here's what it looks like:<BR><BR>LAYER<BR> NAME
"Ethiopia_Rivers"<BR> TYPE LINE<BR> STATUS off<BR> GROUP
Ethiopia<BR> DATA "ethiopia_rivers"<BR> HEADER
'ethiopia_rivers.shp_header.html'<BR>
CLASS<BR> MAXSCALE
8710165<BR> Name 'Ethiopia
Rivers'<BR> COLOR 102 204
255<BR> TEMPLATE
ethiopia_rivers.shp_query.html<BR> END #
CLASS<BR>END # LAYER<BR><BR>Now, when I'm viewing my map at full
extent, my scale factor is 1:<FONT size=3><B> 20136789</B></FONT>,
therefore if I click on the Ethiopia_Rivers layer at that zoom level,
nothing shows up in the map. This is the exact behavior that I would
expect...I'm out of scale for that layer, so it doesn't show up in the map
until I zoom in. The PROBLEM, however, is that the "Ethiopia Rivers"
icon and label pop up in my legend...this is counter-intuitive, contrary
to the documented behavior of Mapserver, and just flat-out frustrating!
If the layer is not showing up in my map (because it's out of
scale), then it should NOT be in my legend either. Grrrr!!!
Pardon me for sounding bitter...I'm not lashing out at you, I'm very
grateful for your help, I'm just frustrated at
Mapserver.<BR><BR>Thanks!<BR><BR>Martin, Daniel wrote:<BR>
<BLOCKQUOTE
cite="mid:4ACBA1414DD9EE418CC250E4AAA9035A192B33@STL-EXBE-I03.corp.erac.com"
type="cite"><PRE wrap="">Perhaps I misunderstood. By default (no opt_flag set) layers that are out<BR>of scale and layers that have a STATUS off will not show in an HTML legend.<BR><BR><BR>A legend exactly like this should do exactly what it sounds like you want:<BR><BR>[leg_class_html]<BR><TR><BR> <TD><BR> <img src="[leg_icon]" border=0><BR> </TD><BR> <TD> <BR> <font face="arial" size=2>[leg_class_name]</font><BR> </TD><BR></TR><BR>[/leg_class_html]<BR><BR>I'm not sure why you are having trouble getting the default action. Perhaps<BR>you could provide your current legend.<BR><BR>-Dan<BR><BR>-----Original Message-----<BR>From: Mike Smith [<A class=moz-txt-link-freetext href="mailto:nospam@cnrit.tamu.edu">mailto:nospam@cnrit.tamu.edu</A>]<BR>Sent: Tuesday, October 01, 2002 10:59 AM<BR>To: Martin, Daniel<BR>Cc: <A class=moz-txt-link-abbreviated href="mailto:mapserver-users@lists.gis.umn.edu">mapserver-users@!
li!<BR>
sts.gis.u<BR>mn.edu</A><BR>Subject: Re: [mapserver-users] HTML Legend with Status Checking...<BR><BR><BR>Thank you, but this didn't change a thing. Actually, let me correct <BR>that...it had a negative effect because now all my layers show up too, <BR>even if they are not displayed in the map. I want only active layers to <BR>show in the legend and I want only IN-SCALE class symbols to show up in <BR>the legend, I don't want 4 symbols to show up in the legend for every <BR>layer that I have which has scale-specific classes...I just don't guess <BR>I can do that without converting everything over to Mapscript. X-(<BR><BR>Any other ideas?<BR><BR>Martin, Daniel wrote:<BR><BR></PRE>
<BLOCKQUOTE type="cite"><PRE wrap="">You probably want a bit mask of 2 in your opt_flag. Layers with STATUS off<BR>still show, but layers out of scale don't show. <BR><BR>[leg_layer_html opt_flag=2]<BR><BR><BR>Per <A class=moz-txt-link-freetext href="http://mapserver.gis.umn.edu/doc36/html-legend-howto.html">http://mapserver.gis.umn.edu/doc36/html-legend-howto.html</A> :<BR><BR>1: If set, show layer even if out of scale (default: hide layers out of<BR>scale). <BR><BR>2: If set, show layer even if status is OFF (default: hide layers with<BR>STATUS OFF). <BR><BR>4: If set, show layer even if type is QUERY (default: hide layers of TYPE<BR>QUERY) <BR><BR>8: If set, show layer even if type is ANNOTATION (default: hide layers of<BR>TYPE ANNOTATION) <BR><BR><BR>In my experience, opt_flag=2 is the most intuitive.<BR><BR>-Dan<BR><BR><BR><BR>-----Original Message-----<BR>From: Mike Smith [<A class=moz-txt-link-freetext href="mailto:nospam@cnrit.tamu.edu">mailto:nospam@cnrit.ta!
mu!<BR>.edu</A>]<BR>Sent: Mo<BR>nday, September 30, 2002 5:06 PM<BR>To: <A class=moz-txt-link-abbreviated href="mailto:mapserver-users@lists.gis.umn.edu">mapserver-users@lists.gis.umn.edu</A><BR>Subject: [mapserver-users] HTML Legend with Status Checking...<BR><BR><BR>Hello,<BR><BR> I've seen how you can make legends using PHP Mapscript that check to <BR>see whether a layer or class is in scale before displaying it in the <BR>legend, but no mention of how to do this if I'm not using Mapscript. I <BR>have sub-classed many of my layers so that symbols show up in different <BR>sizes depending on how far zoomed in you are. In other words, I'm using <BR>"MINSCALE" and "MAXSCALE" in my classes, but all of my classes show up <BR>in the legend and that's really annoying! I want ONLY the in-scale <BR>symbol to show up in the legend as it does in the map...any tips on how <BR>to do this without Mapscript? I see the "if" conditional statements in <BR>the HTML Legend How-to, but the!
re's no status o
f "SCALE" to <BR>check with <BR>those statements... if I could put an if statement in my legend template <BR>that checked whether or not a class or layer was in scale, then I'd be <BR>in business...any way to do this?<BR><BR>Thanks!<BR><BR><BR></PRE></BLOCKQUOTE><PRE wrap=""><!----><BR><BR><BR></PRE></BLOCKQUOTE><BR></BLOCKQUOTE></BLOCKQUOTE><BR></BLOCKQUOTE></BODY></HTML>
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