Re: [mapserver-users] Mapserver 6.4 does not draw dense line segments at lower zoom levels. Why?

2020-03-03 Thread Ei Fujioka 
Thanks, Steve, so much for a quick insight!

Yes, the simpler STYLE was the key to fix the problem. In particular, I think, 
as you indicated, the unnecessary SYMBOL was the culprit. I didn't need it as 
the line was just a solid line. And I had to change SIZE 2 to WIDTH 1.5 (WIDTH 
2 was a little bit thicker than I preferred).

Now the lines draw quick at any zoom levels!

Thanks again!

Ei

On 3/2/2020 7:26 PM, Steve Lime wrote:
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 
mailto: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


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--

  Ei Fujioka
  Research Scientist
  Nicholas School
  Duke University

  (919) 684-3518
  efuji...@duke.edu



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Re: [mapserver-users] Mapserver 6.4 does not draw dense line segments at lower zoom levels. Why?

2020-03-02 Thread Steve Lime 
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  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
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[mapserver-users] Mapserver 6.4 does not draw dense line segments at lower zoom levels. Why?

2020-03-02 Thread Ei Fujioka 
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


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mapserver-users@lists.osgeo.org
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