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add daily raster of SMAP data
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vzrg-tamu committed Feb 20, 2024
1 parent 94746c9 commit 987502b
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14 changes: 7 additions & 7 deletions ch2_a.qmd
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Expand Up @@ -293,6 +293,11 @@ print(coastlines)
# download.file("https://www.naturalearthdata.com/http//www.naturalearthdata.com/download/110m/physical/ne_110m_coastline.zip?version=4.0.1",destfile = 'ne_110m_coastline.zip')
# # Unzip the downloaded file
# unzip(zipfile = "ne_110m_coastline.zip",exdir = 'ne-coastlines-110m')
# Interactive polygon map with mapview
library(mapview)
mapview(IPCC_shp) # Scroll over the region of interest and find the attributes for the region
```

Subsetting vector data is similar to selecting a row from a data frame.
Expand Down Expand Up @@ -351,19 +356,14 @@ In R, the coordinate reference systems or `CRS` are commonly specified in `EPSG`

------------------------------------------------------------------------

+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------+-------------+
| | | |
|---------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------|-------------|
| *Projection system* | *PROJ.4 code* | *EPSG code* |
+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------+-------------+
| NAD83 (North American Datum 1983) | "+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs +type=crs" | EPSG:4269 |
+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------+-------------+
| Mercator | "+proj=merc +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +R=6371000 +units=m +no_defs +type=crs" | ESRI:53004 |
+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------+-------------+
| WGS 84 (World Geodetic System 1984) | "+proj=merc +lon_0=0 +k=1 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs +type=crs" | EPSG:3395 |
+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------+-------------+
| WGS 84 / Pseudo-Mercator -- Spherical Mercator ( used in Google Maps, OpenStreetMap) | "+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=`@null` +wktext +no_defs +type=crs" \| | EPSG:3857 |
+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------+-------------+
| Robinson (better for plotting global data due to minimal distortion, except for higher latitudes) | "+proj=robin +lon_0=0 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs +type=crs" | ESRI:54030 |
+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------+-------------+

------------------------------------------------------------------------

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2 changes: 1 addition & 1 deletion ch3.qmd
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Expand Up @@ -3,7 +3,7 @@ title-block-banner: true
bibliography: references.bib
---

# Geospatial Operations on Raster & Vectors
# Raster Arithmatic and statistics

```{r child="ch3_a.qmd", message = FALSE, warning = FALSE}
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