[mapserver-users] Expressions (Couple of Firebug how-to's)
Bob Basques
Bob.Basques at ci.stpaul.mn.us
Wed Sep 29 12:10:13 EDT 2010
Install:
http://www.youtube.com/watch?v=r6F-D61S-h4 (
http://www.youtube.com/watch?v=r6F-D61S-h4 )
Usage examples:
http://www.youtube.com/watch?v=W4jXAaEMp2M (
http://www.youtube.com/watch?v=W4jXAaEMp2M )
http://www.youtube.com/watch?v=FsX6qwQqGgQ (
http://www.youtube.com/watch?v=FsX6qwQqGgQ )
There are plenty more out there via a google search . . .
bobb
>>> David William Bitner <bitner at gyttja.org> wrote:
Jay,
I am not exactly sure how the params work in GeoMoose. One tip in
general to be able to isolate the problem to either GeoMoose or
MapServer is to look at the actual requests that are being made to
MapServer. One of the easiest ways to do this is to either use the
FireBug extension in FireFox or the Javascript Console in Chrome. With
this take a look at the URL that is being sent to MapServer and see what
is in the parameter &LASTWEEK=.
David
On Wed, Sep 29, 2010 at 10:49 AM, Jay Kapalczynski
<jkapalczynski at ci.maple-grove.mn.us>
wrote:
I thank you for your response....greatly appreciated as I cannot figure
this out....
I know that I have 4 features in the dataset that have a value of
20100916 that’s 13 days ago....so with the expression below those 4 or 5
features should show up....but nothing shows up
IncidentDa is the field (long integer)
Param type is specifying YYYYMMDD my data has values of 20100916 (13
days)
I have no idea what could be wrong…Thank you all for your help….
.XML file
<map-source name="Burglaries" type="mapserver">
<file>./maple_grove_datasets/police/Burglaries.map</file>
<param type="today" offset="-90" name="LASTNINTY" format="%4Y%2M%2D" />
<param type="today" offset="-30" name="LASTTHIRTY" format="%4Y%2M%2D" />
<param type="today" offset="-14" name="LASTTWOWEEKS" format="%4Y%2M%2D"
/>
<param type="today" offset="-7" name="LASTWEEK" format="%4Y%2M%2D" />
<param type="today" offset="0" name="TODAY" format="%4Y%2M%2D" />
<layer name="Burglaries"/>
</map-source>
.MAP file
CLASS
NAME 'Last Weeks'
EXPRESSION ('[IncidentDa]' > '%LASTTWOWEEKS%' && '[IncidentDa]' <
'%LASTWEEK%')
STYLE
COLOR 0 100 50
SYMBOL "bike"
SIZE 12
END
END
=======================================
BUT if I simply place this in there I get all the points…so something is
weird here because most of the dates are older than 7 days.
CLASS
NAME 'Last Weeks'
EXPRESSION ('[IncidentDa]' > '%LASTWEEK%’)
STYLE
COLOR 0 0 0
SYMBOL "tent"
SIZE 12
END
#END
-----Original Message-----
From: mapserver-users-bounces at lists.osgeo.org
[mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of Stephen
Woodbridge
Sent: Wednesday, September 29, 2010 8:19 AM
To: mapserver-users at lists.osgeo.org
Subject: Re: [mapserver-users] Expressions
In EXPRESSIONS you can evaluate any of the following:
1. Regular expressions treating the value as a string
2. numeric expressions using booleans like ==,<,>,<=,>=
3. string expressions like ==, !=, and I think strlen()
So if you converted you dates into a format like YYYYMMDD then it would
be easy to use a numeric expression like:
EXPRESSION ('[dateValues]' > '%STARTDATE%' && '[dateValues]' <
'%ENDDATE%')
or
EXPRESSION ('[dateValues]' > '%STARTDATE%')
where STARTDATE is the YYYYMMDD value of two weeks ago and ENDDATE would
be in the same format and allow you to extract record betwee any two
start and end dates.
Or you might be able to figure out a complex regular expression the
represents the last two weeks like:
EXPRESSION ('[dateValues]' =~ '/%LASTTWOWEEKS%/')
I'm not sure what you would need for the regular expression.
-Steve W
On 9/28/2010 4:23 PM, Jay Kapalczynski wrote:
> Anyone have anymore ideas about this….
>
> I have a string field with values
>
> And the code below. The expression does not seem to
be running…if I
only
> use LA> [mailto:mapserver-users-bounces at lists.osgeo.org] *On Behalf Of *Jay
> Kapalczynski
> *Sent:* Tuesday, September 21, 2010 9:51 AM
> *To:* 'Bob Basques'; mapserver-users at lists.osgeo.org
> *Subject:* RE: [mapserver-users] Expressions
>
> My major question is can I do this with a String/text field? Its the
> only way I can see keeping things in a %2Y%2M%2D format ex. 092110
(Sept
> 21^st 2010), otherwise the 0 will get removed in a numeric field
>
> Can I use the format Year, Month, Day? Or do I have to use Month, Day,
Year?
>
> In this example I eliminated two expressions and focused on one
> Expression to see if it is working.
>
> *_I kept this_*
>
> <map-source name="Burglaries" type="mapserver">
>
> <file>./maple_grove_datasets/police/Burglaries.map</file>
>
> <param type="today" offset="-7" name="LASTWEEK" format="%2Y%2M%2D" />
>
> <param type="today" offset="-14" name="LASTTWOWEEKS"
format="%2Y%2M%2D" />
>
> <param type="today" offset="-30" name="LASTTHIRTY" format="%2Y%2M%2D"
/>
>
> <param type="today" offset="-90" name="LASTNINTY" format="%2Y%2M%2D"
/>
>
> <layer name="Burglaries"/>
>
> </map-source>
>
> *_In my map file I used _**_ONLY_**_ this_*
>
> CLASS
>
> NAME 'Last Weeks'
>
> EXPRESSION ('[dateValues]' > '%LASTTWOWEEKS%')
>
> STYLE
>
> COLOR 0 100 50
>
> SYMBOL "bike"
>
> SIZE 12
>
> END
>
> END
>
> Now in my data I have these values (below), although every symbol was
> displayed in the map
>
> NOTE THIS IS A TEXT FIELD
>
> 081204, 081225,090118
>
> These values (above) for the Year, Month, Day format specified in the
> map source are clearly less than the “last two weeks”, Where as they
are
> older than the last 14 days….so none of them should show up, but they
do
>
> Any thoughts
>
> *From:* mapserver-users-bounces at lists.osgeo.org
> [mailto:mapserver-users-bounces at lists.osgeo.org] *On Behalf Of *Bob
Basques
> *Sent:* Friday, September 17, 2010 9:25 PM
> *To:* mapserver-users at lists.osgeo.org
> *Subject:* Re: [mapserver-users] Expressions
>
> A first stab at seeing more than one class, might be to try and switch
> them around order wise, one filter may be overwriting the other for
example.
>
> bobb
>
>
>
>
> On 9/17/2010 8:20 AM, Jay Kapalczynski wrote:
>
> I am using GeoMoose but feel this is more a question for Map Server.
>
> I am trying to sort my points by dates using the code below….I think
> that I can do this but not sure
>
> Is this a viable format “2Y%2M%2D” ?
>
> As for the field in the shapefile…If I use an integer it removes the 0
> from the 092110, (sept 21^st 2010)
>
> If I use a date then there are “/” … 9/21/10
>
> The only way I can see this happening is using a text field with
retains
> the 0 in 092110
>
> When I use the textfield “dateValues” as seen below I can get the
stars
> to draw but only the LASTWEEK…for some reason the LASTTWOWEEKS does
not
> show and I know that I have a few records with dates in the last 14
days…
>
> Thoughts?
>
> THANKS….all your help is very appreciated….
>
> Main .xml file
>
> <map-source name="Burglaries" type="mapserver">
>
> <file>./maple_grove_datasets/police/Burglaries.map</file>
>
> <param type="today" offset="-7" name="LASTWEEK" format="%2Y%2M%2D" />
>
> <param type="today" offset="-14" name="LASTTWOWEEKS"
format="%2Y%2M%2D" />
>
> <param type="today" offset="-30" name="LASTTHIRTY" format="%2Y%2M%2D"
/>
>
> <param type="today" offset="-90" name="LASTNINTY" format="%2Y%2M%2D"
/>
>
> <layer name="Burglaries"/>
>
> </map-source>
>
> .map file
>
> CLASS
>
> NAME 'Last Weeks'
>
> EXPRESSION ('[dateValues]' > '%LASTWEEK%')
>
> STYLE
>
> COLOR 0 0 0
>
> SYMBOL "star"
>
> SIZE 12
>
> END
>
> END
>
> CLASS
>
> NAME 'Last Two Weeks'
>
> EXPRESSION ('[dateValues]' > '%LASTTWOWEEKS%')
>
>
STYLE
>
> COLOR 0 100 50
>
> mapserver-users at lists.osgeo.org
<mailto:mapserver-users at lists.osgeo.org>
>
> http://lists.osgeo.org/mailman/listinfo/mapserver-users
>
>
>
> _______________________________________________
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--
************************************
David William Bitner
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