CODEWITHSUNDEEP
rgoogle-earth-enginergee
Steph
Steph

Reputation: 43

Image stats in Google Earth Engine and rgee package in R?

I'm trying to calculate the mean of all pixels at the county level for an image in Google Earth Engine and am using the rgee package in R Studio.

I've tried following the example here: https://github.com/csaybar/rgee/blob/examples/image/image_stats_by_band.R

The code runs but results in a long print out in R of feature$geometry$coordinates, feature$properties, etc., and I just want the mean value of the band and would like to use the mean value in subsequent calculations. I think I want one of the value in one of the last lines that is printed: $features[[1]]$properties$data

#GY16 is an image covering a U.S. state with 1 band and I would like to calculate the mean of that image at the county level. shp1 is the county geometry.  

geometry <- shp1
means <- GY16$reduceRegions(
  collection = geometry,
  reducer = ee$Reducer$mean()$forEachBand(GY16),
  scale=10
)

print(means$getInfo())

Any advice is appreciated. Thank you!

Upvotes: 0

Views: 444

Answers (1)

csaybar
csaybar

Reputation: 179

This example was made in rgee early versions, now you can use ee_extract:

library(rgee)

# remotes::install_github("r-spatial/rgee") please install rgee v1.0.9
ee_Initialize()

image <- ee$Image("USDA/NAIP/DOQQ/m_3712213_sw_10_1_20140613")
geometry <- image$geometry()
ee_extract(image, geometry, scale = 100, sf = FALSE)

Upvotes: 0

Related Questions