Sunday, June 17, 2012

Negros Quake Animation in R

Taken from a previous post in other website, maps below show the locations of epicenters and sequence of earthquakes that struck Negros last February 6, 2012. The bottom image is the animation these maps using animation package in R. Data was taken from United State Geological Survey.

3D Maps in R

Talking about elevation, one can also plot a wire frame 3D view of an area using the persp function. Using the same data source from my previous post, 3D view of Marinduque, Philippines was produced using the following code below:







#############################################################################################
library(maptools)
library(raster)
alt <- getData('alt', country='PHL')
adm <- getData('GADM', country='PHL', leve=1)
mar<-(adm[adm$NAME_1=="Marinduque",])
maralt<-crop(alt,mar)
persp(maralt, exp=0.2,phi=35, xlab="Longitude", ylab="Latitude", zlab="Elevation")

#############################################################################################
 persp(maralt, exp=0.2,phi=35, xlab="Longitude", ylab="Latitude", zlab="Elevation", shade=0.45, col="green4")
#############################################################################################

Friday, June 15, 2012

Mindoro Digital Elevation Map

Saw a map produced by my previous student using a commercial GIS software.Using R raster package and data from diva-gis.org. I produced a similar map.


Friday, June 8, 2012

RSMC 2011 Typhoon Tracks

While at Puerto Princesa Airport in Palawan and waiting for my flight back to Manila, I opened my laptop and started doing what I usually do (practice my skills in R) during my idle time. With some inspirations from spatialanalysis.co.uk, I tried to make a map that maybe relevant to the Philippines (especially this coming rainy season).


Here is another version of the same map:



Thursday, June 7, 2012

Earthquake Density in the Philippines (2011-2012)


Using the same data and package from my previous post, but minor tweak on the code, I produced the map below:

Poverty Incidence in the Philippines

Every three (3) years, the National Statistical Coordination Board (NSCB) publish data on provincial poverty incidence in the Philippines. Using R, I put the tabulated poverty incidence data into maps to check pattern and changes on the country's provincial poverty level.

Wednesday, June 6, 2012

Barangay Salvacion in the Philippines

While traveling across the Visayas, I encountered barangay (villages) with the name same as my last name. Using R and map data from gadm.org I search and mapped other villages in the country named “Salvacion”.