Hi! My guess is your v.5 style is being interpreted differently in v.6. For
example, what’s the purpose of the ANGLE 360? There were some big changes
between versions 5 and 6. For example you don’t have to use a circular
brush to draw a thick line. You should be able to do something much simpler
like:
STYLE
COLOR 0 0 255
WIDTH 2
END
—Steve
On Mon, Mar 2, 2020 at 4:48 PM Ei Fujioka <efuji...@duke.edu> wrote:
> Hello all,
>
> I'm upgrading a web site that I have been developing for many years. The
> web site uses Mapserver & Mapscript along with PHP. Mapserver layers are
> drawn on top of Google Maps using Javascript.
>
> What I'm struggling to figure out is that a line layer is not drawn at
> lower zoom levels with Mapserver & Mapscript 6.4 and PHP 5.4.16. When
> zooming in, the lines will start getting drawn but still not fully.
>
> The same layer was drawn at any zoom levels without any problem under
> Mapserver 5.2 and PHP 5.2.6.
>
> Are there any mapfile settings (new to Mapserver 6.4 or changed from
> Mapserver 5.2) that limit the number of line segments to be drawn at
> unit cell or affects how the lines are drawn at differently zoom levels?
> Are there any limits in Mapscript/PHP regarding data size to fetch or
> draw? The line data of the layer is stored in a PostgreSQL table which
> has a lot of records (~270,000 line segments). If the line layer does
> not have such a large number of records (e.g. ~10,000), it draws fine.
>
> Please take a look at an image (screenshots) that shows how the lines
> are drawn differently between Mapserver 5.2 and Mapserver 6.4:
> http://seamap.env.duke.edu/images/mapserver6_4_not_draw_lines.png
>
> The new web site is not publicly available yet, so I can't let you
> explore but the existing web site that draws the example line layer fine
> can be accessed at
> http://seamap.env.duke.edu/dataset/2001
> # Please turn on "Survey tracks" in the Layer selection.
>
>
> The snippet of the mapfile is below.
> Thanks for your help in advance!
>
> Ei Fujioka
> Duke University
>
>
> === Mapfile ===
> MAP
> EXTENT -20001364 -15000982 20001253 15000982
> IMAGETYPE "PNG"
> NAME "OBIS-SEAMAP_OGC_SERVICES"
> SIZE 256 256
> STATUS ON
> TRANSPARENT TRUE
> UNITS METERS
>
> OUTPUTFORMAT
> NAME "PNG"
> MIMETYPE "image/png"
> DRIVER "AGG/PNG"
> EXTENSION "png"
> IMAGEMODE RGBA
> TRANSPARENT TRUE
> END # OUTPUTFORMAT
>
> PROJECTION
> "init=epsg:3857"
> END # PROJECTION
>
> SYMBOL
> NAME "solid_line"
> TYPE ELLIPSE
> POINTS
> 1 1
> END
> FILLED true
> END
>
> WEB
> IMAGEPATH "/var/www/tmp/"
> IMAGEURL "/tmp/"
> METADATA
> "wms_srs" "EPSG:3857 EPSG:4326"
> "ows_enable_request" "*"
> "wms_title" "Online Mapper"
> END # METADATA
> END # WEB
>
> LAYER
> CLASSITEM "classitem_dataset"
> CONNECTION "user=xxx password=xxx dbname=xxx host=xxx"
> CONNECTIONTYPE POSTGIS
> DATA "geom from (SELECT ..., as classitem_dataset, 'solid_line' as
> symbol FROM z_tracks WHERE ...) AS foo USING UNIQUE oid USING SRID=4326"
> METADATA
> "wms_legend_graphic" "true"
> "gml_featureid" "oid"
> "title" "Survey tracklines"
> "gml_include_items" "all"
> "wms_title" "Survey tracklines"
> END # METADATA
> NAME "survey_tracks"
> PROJECTION
> "init=epsg:4326"
> END # PROJECTION
> STATUS OFF
> TILEITEM "location"
> TOLERANCE 1
> TYPE LINE
> UNITS METERS
> CLASS
> NAME "class_0"
> EXPRESSION "0_ON"
> STYLE
> ANGLE 360
> COLOR 255 0 0
> OUTLINECOLOR 255 0 0
> SIZE 2
> SYMBOL [symbol]
> END # STYLE
> END # CLASS
>
> # In total 60 CLASS ... END are defined
> END # LAYER
>
>
> --
> ========================
> Ei Fujioka
> Research Scientist
> Nicholas School
> Duke University
>
> (919) 684-3518
> efuji...@duke.edu
> ========================
>
> _______________________________________________
> mapserver-users mailing list
> mapserver-users@lists.osgeo.org
> https://lists.osgeo.org/mailman/listinfo/mapserver-users
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