mdmadhu

library(gganimate)
library(magick)
library(scales)
library(sf) 
library(tidyverse)


# Importing the India states shapefile into a simple feature, and reducing
# number of vertices for quick screen drawing
india = st_read("India/States.shp") %>%

mdmadhu

# MD Madhusudan, mdm@ncf-india.org, Nature Conservation Foundation, 2017-03-02
# Creates a subset of eBird data (.txt, after download and unzipping archive) that fall within a particular region of interest whose vertices are specified (see Arguments section below for how the vertices are to be specified)

eBirdData_SpatialSubset <- function(eBirdDataFileFullPath, AoIVertices, ReturnSpatialObject=FALSE){

  # ARGUMENTS
  # eBirdDataFileFullPath: must be a full path to the filename, and placed within quotes
  # AoIVertices: vertices of a POLYGON describing the area of interest in the form
  #              "76 12, 77 12, 77 13, 76 13, 76 12", where each comma-separated pair of
  #              values represents the longitude-latitude coordinates of each vertex. NOTE

mdmadhu

# MD Madhusudan, mdm@ncf-india.org, Nature Conservation Foundation, 2016-04-10
# Code to import waypoints from multiple GPX files in a folder,
# extract coordinates from each file into a single object, and 
# export to CSV or some other format
# 
# - initialisation steps
library(plotKML)
library(dplyr)

# Set working directory to folder where all the GPX Waypoint files are present