问题描述
如何在光栅化过程中在字段中包含多个字符向量？
sum.v <- vect(summer_values,geom=c("X","Y"),crs="epsg:4326")
sum.v <- terra::project(sum.v,sun.rast)
sum.v_2009 <-sum.v%>%
terra::rasterize(sun.rast,c("Summer_2009","Summer_2010"))
names(sum.v)
[1] "Summer_2009" "Summer_2010" "Summer_2011" "Summer_2012"
[5] "Summer_2013" "Summer_2014" "Summer_2015" "Summer_2016"
[9] "Summer_2017" "Summer_2018" "Summer_2019" "Coastal_Cities"
SpatRaster 数据：
sun.rast
class : SpatRaster
dimensions : 290,180,11 (nrow,ncol,nlyr)
resolution : 5000,5000 (x,y)
extent : -2e+05,7e+05,-2e+05,1250000 (xmin,xmax,ymin,ymax)
coord. ref. : +proj=tmerc +lat_0=49 +lon_0=-2 +k=0.9996012717 +x_0=400000 +y_0=-100000 +a=6377563.396 +rf=299.324961266495 +units=m +no_defs
sources : sun_hadukgrid_uk_5km_seas_200901-200912.nc
sun_hadukgrid_uk_5km_seas_201001-201012.nc
sun_hadukgrid_uk_5km_seas_201101-201112.nc
... and 8 more source(s)
varnames : sun (Sunshine hours)
sun (Sunshine hours)
sun (Sunshine hours)
...
names : sun_3,sun_3,...
unit : hour,hour,...
time : 2009-07-17 to 2019-07-17
警告信息： 在 if (field != "") { : 条件的长度 > 1 并且只使用第一个元素
一些代码：
summer_values <- structure(list(Summer_2009 = c(501.574778416789,497.23728360199,497.61686652504,490.152801533259,487.926624123223),Summer_2010 = c(552.15358001888,539.422481406991,544.592473937123,531.067001849623,526.872958713714
),Summer_2011 = c(466.172979620426,455.343068520793,458.47881616961,446.66203650141,443.013987031318),Summer_2012 = c(415.175042208515,408.956046115294,411.354325261626,403.962524048422,402.260345730052
),Summer_2013 = c(631.57123174756,622.029331693976,626.041896670884,613.490126706086,608.51521408192),Summer_2014 = c(665.070703822075,659.84212560111,663.501153102094,654.769857459827,650.633495190551
),Summer_2015 = c(487.113946360211,477.18082182742,479.267886683776,467.824113810407,463.960603587997),Summer_2016 = c(474.592225824081,466.145013452213,469.399319785728,458.943733828422,454.994896176023
),Summer_2017 = c(498.34924661133,494.588099225139,494.926318646358,488.53166390283,486.521775155493),Summer_2018 = c(639.152209854641,628.982562423085,631.774207608961,618.636603897715,614.462182951034
),Summer_2019 = c(561.763428056815,563.985839571988,562.998859621631,561.595114701102,561.461548754331),X = c(377500,382500,377500,387500),Y = c(127500,127500,122500,122500
),Coastal_Cities = c("Dorset","Dorset","Dorset")),row.names = c(NA,5L),class = "data.frame")
解决方法
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