From hh8em at virginia.edu Thu Nov 16 06:25:19 2017 From: hh8em at virginia.edu (heng huang) Date: Wed, 15 Nov 2017 21:25:19 -0800 Subject: [RS-ecology] Calculation of fractional cover for each vegetation class matching MODIS LST pixel Message-ID: Dear All, I am trying to look at the differences in land surface temperature between different vegetation types. For example, I have a Landsat land cover map with 30-m resolution and I want to calculate the fractional cover for each vegetation class (forests, grasslands and croplands etc.) matching MODIS swath and do a linear regression analysis linking land cover percentage with the corresponding MODIS LST for each 1-km resolution pixel. Therefore, the fractional changes will be calculated by computing at 30m the proportion of each vegetation class (e.g. forest) that occupy each MODIS 1km grid cell, but I hardly found any practical tutorial using R to achieve this, so any advice on it will be appreciated! Further, after calculating the fractional change in vegetation with analogous changes in MODIS LST, I want to do the linear regression for LST as a function of the fractional changes but also I haven't found an effective way to process it in R. I would also be grateful if you can give some practical advice on it. Thanks so much! Henry -------------- next part -------------- An HTML attachment was scrubbed... URL: From benjamin.leutner at uni-wuerzburg.de Thu Nov 16 18:00:31 2017 From: benjamin.leutner at uni-wuerzburg.de (Benjamin Leutner) Date: Thu, 16 Nov 2017 18:00:31 +0100 Subject: [RS-ecology] Calculation of fractional cover for each vegetation class matching MODIS LST pixel In-Reply-To: References: Message-ID: <53425d70-54c4-63f4-7f8a-35787515345c@uni-wuerzburg.de> Have a look at fCover from RStoolbox. It does just that. On 11/16/2017 06:25 AM, heng huang wrote: > Dear All, > > I am trying to look at the differences in land surface temperature > between different vegetation types. For example, I have a Landsat land > cover map with 30-m resolution and I want to calculate the fractional > cover for each vegetation class (forests, grasslands and croplands > etc.) matching MODIS swath and do a linear regression analysis linking > land cover percentage with the corresponding MODIS LST for each 1-km > resolution pixel. Therefore, the fractional changes will be calculated > by computing at 30m the proportion of each vegetation class (e.g. > forest) that occupy each MODIS 1km grid cell, but I hardly found any > practical tutorial using R to achieve this, so any advice on it will > be appreciated! > > Further, after calculating the fractional change in vegetation with > analogous changes in MODIS LST, I want to do the linear regression for > LST as a function of the fractional changes but also I haven't found > an effective way to process it in R. I would also be grateful if you > can give some practical advice on it. > > > Thanks so much! > > > Henry > > > > > _______________________________________________ > RS-ecology mailing list > RS-ecology at lists.uni-wuerzburg.de > https://lists.uni-wuerzburg.de/mailman/listinfo/rs-ecology -- Benjamin Leutner Department of Remote Sensing University of Wuerzburg Campus Hubland Nord 86 97074 Wuerzburg, Germany Tel: +49-(0)931-31 89594 Fax: +49-(0)931-31 89594-0 Email: benjamin.leutner at uni-wuerzburg.de Web: http://www.fernerkundung.uni-wuerzburg.de -------------- next part -------------- An HTML attachment was scrubbed... URL: