[postgis-users] ​ST_MapAlgebra question

Guido Lemoine guido.lemoine at jrc.ec.europa.eu
Tue May 26 04:05:35 PDT 2015

Try reading the manual


Guido Lemoine

European Commission, Joint Research Centre

Institute for Environment and Sustainability, Monitoring Agricultural Resources Unit

TP 266 – 21027 Ispra, Italy, T. +39 0332 786239, F. +39 0332 785162


E-mail: guido.lemoine at jrc.ec.europa.eu  URL: http://ec.europa.eu/jrc


From: postgis-users-bounces at lists.osgeo.org [mailto:postgis-users-bounces at lists.osgeo.org] On Behalf Of Ahmet Temiz
Sent: 26 May 2015 13:03
To: PostGIS Users Discussion; PostGIS Users Discussion
Subject: [postgis-users] ​ST_MapAlgebra question






ST_MapAlgebra(rast, 1, '32BF', '[rast] / 100.', -9999)


​in this exp.  What does < [rast] / 100. > mean ?

Why do we need to divide the raster value to 100?


I will appreciate if you explain 









Ahmet Temiz
Jeoloji Müh.
Afet ve Acil Durum Yönetimi Başkanlığı
Bilgi İşlem  Dairesi Başkanlığı-CBS Grubu


Ahmet Temiz
Geological Eng.
Information Systems - GIS Group
Disaster and Emergency Management
of Presidency

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