I Created a heatmap from a sql point table using sld in Geoserver.
Displays fine as a preview but only displays as a tile in html.
<http://osgeo-org.1560.x6.nabble.com/file/n5161387/HMTL.png>
Have tried singeTile and a few other things.
Can people please suggest other things to try??
Cheers
Tim
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Hi,
I believe there is nothing else to try, heatmaps by their nature cannot be computed
in tiles, they have to be computed for the whole area you’re looking
at, each time, since they are a visualization relative the current map
contents, from a density value ranging from 0 (no data) to 1 (area
where the current max density resides, and which will change every
time you pan and zoom).
I’m not sure, did not do a detailed research, but believe any algorithm
that is tile-able will have to drop one of the desirable features of
the heatmap, that is, lose the ability to show the “hottest” areas
within the current visualization.
Cheers
Andrea
On Fri, Sep 12, 2014 at 12:07 AM, TimmyW <tim.warfe@anonymised.com> wrote:
I Created a heatmap from a sql point table using sld in Geoserver.
Displays fine as a preview but only displays as a tile in html.
<http://osgeo-org.1560.x6.nabble.com/file/n5161387/HMTL.png>
Have tried singeTile and a few other things.
Can people please suggest other things to try??
Cheers
Tim
–
View this message in context: http://osgeo-org.1560.x6.nabble.com/Showing-Heatmap-Openlayers-tp5161387.html
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Ing. Andrea Aime
@geowolf
Technical Lead
GeoSolutions S.A.S.
Via Poggio alle Viti 1187
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 1660272
mob: +39 339 8844549
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The information in this message and/or attachments, is intended solely for the attention and use of the named addressee(s) and may be confidential or proprietary in nature or covered by the provisions of privacy act (Legislative Decree June, 30 2003, no.196 - Italy’s New Data Protection Code).Any use not in accord with its purpose, any disclosure, reproduction, copying, distribution, or either dissemination, either whole or partial, is strictly forbidden except previous formal approval of the named addressee(s). If you are not the intended recipient, please contact immediately the sender by telephone, fax or e-mail and delete the information in this message that has been received in error. The sender does not give any warranty or accept liability as the content, accuracy or completeness of sent messages and accepts no responsibility for changes made after they were sent or for other risks which arise as a result of e-mail transmission, viruses, etc.
Hi,
I did some testing with a GeoMesa backed layer with heat maps and can confirm that the heat map works best as a single tile. We use OpenLayers 2.13.1. When I use tiles and set the meta tile to 4 (default), I get individual tiles for the heat map that are close, but there are obvious issues. This prompted us to modify our OL application to request the layer with a heat map SLD applied as a single tile.
Chris Snider
Senior Software Engineer
Intelligent Software Solutions, Inc.
Hi,
I believe there is nothing else to try, heatmaps by their nature cannot be computed
in tiles, they have to be computed for the whole area you’re looking
at, each time, since they are a visualization relative the current map
contents, from a density value ranging from 0 (no data) to 1 (area
where the current max density resides, and which will change every
time you pan and zoom).
I’m not sure, did not do a detailed research, but believe any algorithm
that is tile-able will have to drop one of the desirable features of
the heatmap, that is, lose the ability to show the “hottest” areas
within the current visualization.
Cheers
Andrea
On Fri, Sep 12, 2014 at 12:07 AM, TimmyW <tim.warfe@…6685…> wrote:
I Created a heatmap from a sql point table using sld in Geoserver.
Displays fine as a preview but only displays as a tile in html.
<http://osgeo-org.1560.x6.nabble.com/file/n5161387/HMTL.png>
Have tried singeTile and a few other things.
Can people please suggest other things to try??
Cheers
Tim
–
View this message in context: http://osgeo-org.1560.x6.nabble.com/Showing-Heatmap-Openlayers-tp5161387.html
Sent from the GeoServer - User mailing list archive at Nabble.com.
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Comply to PCI DSS 3.0 Requirement 10 and 11.5 with EventLog Analyzer
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==
GeoServer Professional Services from the experts! Visit
http://goo.gl/NWWaa2 for more information.
==
Ing. Andrea Aime
@geowolf
Technical Lead
GeoSolutions S.A.S.
Via Poggio alle Viti 1187
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 1660272
mob: +39 339 8844549
http://twitter.com/geosolutions_it
AVVERTENZE AI SENSI DEL D.Lgs. 196/2003
Le informazioni contenute in questo messaggio di posta elettronica e/o nel/i file/s allegato/i sono da considerarsi strettamente riservate. Il loro utilizzo è consentito esclusivamente al destinatario del messaggio, per le finalità indicate nel messaggio stesso. Qualora riceviate questo messaggio senza esserne il destinatario, Vi preghiamo cortesemente di darcene notizia via e-mail e di procedere alla distruzione del messaggio stesso, cancellandolo dal Vostro sistema. Conservare il messaggio stesso, divulgarlo anche in parte, distribuirlo ad altri soggetti, copiarlo, od utilizzarlo per finalità diverse, costituisce comportamento contrario ai principi dettati dal D.Lgs. 196/2003.
The information in this message and/or attachments, is intended solely for the attention and use of the named addressee(s) and may be confidential or proprietary in nature or covered by the provisions of privacy act (Legislative Decree June, 30 2003, no.196 - Italy’s New Data Protection Code).Any use not in accord with its purpose, any disclosure, reproduction, copying, distribution, or either dissemination, either whole or partial, is strictly forbidden except previous formal approval of the named addressee(s). If you are not the intended recipient, please contact immediately the sender by telephone, fax or e-mail and delete the information in this message that has been received in error. The sender does not give any warranty or accept liability as the content, accuracy or completeness of sent messages and accepts no responsibility for changes made after they were sent or for other risks which arise as a result of e-mail transmission, viruses, etc.
