pnlt

La Tigra was declared a National Park in 1980, although it has existed as a protected area since the 70s, it is located in the Department of Francisco Morazán, in central Honduras, northeast of Tegucigalpa; have a total area of 24,040 hectares. Currently the PNLT is co-managed by Instituto de Conservación Forestal (ICF) and Fundación Amigos de La Tigra (AMITIGRA), in the past the municipalities of Santa Lucia, Valle de Ángeles and Cantarranas were also co-managers of the Park.

Installation | Datasets | Usage | Credits

Installation

The package pnlt is a compendium of spatial data from La Tigra National Park (PNLT by its acronym in Spanish), Honduras. This package can be install with:

#install.packages("devtools")
library(devtools)
install_github("klauswiese/pnlt")

Datasets

All spatial data is an sf object with geographic coordinate reference system (EPSG:4326), here is a list of the available objects:

1. Administrative limits

#	sf object	Details	Scale	Geometry	Source
1	Communities	Groups of houses and farms	Unknown	point	INE 2001
2	Villages	Limits from villages	Unknown	polygon	INE 2001
3	Municipalities	Limits of 4 municipalities that convey in La Tigra	Unknown	polygon	INE 2001
4	Departments	Francisco Morazán department	Unknown	polygon	INE 2001
5	PNLT	National park limits from 1980	Unknown	polygon	Decreto Ley 976-80

2. Development structures

#	sf object	Details	Scale	Geometry	Source
1	Water intake structures	Water micro dams	Unknown	polygon	Fundación AMITIGRA
2	Schools	Schools location within La Tigra	Unknown	point	Secretaría de Educación de Honduras
3	Trails	Turistic trails	Unknown	line	Fundación AMITIGRA
4	Visitors Centers	Centers with personal from AMITIGRA	Unknown	point	Fundación AMITIGRA
5	Roads	Road network with a development classification	Unknown	line	SOPTRAVI 2000

3. Natural resources

#	sf object	Details	Scale	Geometry	Source
1	Microbasins	Derived from the 30 meters SRTM digital elevation model	1:114,000	polygon	Fundación AMITIGRA
2	Holdridge	Holdrige Life Zone Classification	1:1,000,000	polygon	Holdridge 1962
3	Rivers	Water bodies	1:50,000	line	IGN
4	LULC2020	Land use and land cover for year 2020	10 meters pixel	polygon	Fundación AMITIGRA 2020

4. Fires

#	sf object	Details	Scale	Geometry	Source
1	Fires1998	Fires from year 1998	30 meters pixel	polygon	K. Wiese 2020
2	Fires2000	Fires from year 2000	30 meters pixel	polygon	K. Wiese 2020
3	Fires2001	Fires from year 2001	30 meters pixel	polygon	K. Wiese 2020
4	Fires2011	Fires from year 2011	30 meters pixel	polygon	K. Wiese 2020
5	Fires2020	Fires from year 2020	10 meters pixel	polygon	K. Wiese 2020

5. Miscellaneous

#	sf object	Details	Scale	Geometry	Source
1	Hills	Hills names and elevation	1:50,000	point	IGN
2	Site Names	Outstanding names	1:50,000	point	IGN

Usage

Mapping

tmap mapping

# libraries
library(pnlt) #load pnlt package 
library(tmap) #tmap for mapping

#plot villages from PNLT
tm_shape(Villages
)  +
  tm_layout(
    "Village Population in PNLT",
    legend.title.size=1,
    legend.text.size = 0.6,
    legend.position = c("left","bottom"),
    legend.bg.alpha = 1
    ) +
  tm_fill("POBTOT2001",
    border.col = "black",
    style = 'jenks',
    title = "Population \n2001",
    palette = "Reds",
    legend.hist = TRUE,
    legend.z = 1
  ) + 
  tm_borders(col="black"
  ) +
  tm_compass(position = c(0.85,0.8), 
             type = "8star"
             ) +
  tm_scale_bar(position = c(0.7,0),
               lwd = 0.4,
               breaks = c(0,5),
               color.light = "black",
               text.size = 0.8
               ) +
  tm_grid(labels.cardinal = TRUE
  )

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ggplot2 mapping

# libraries  
library(pnlt) #load pnlt package 
library(ggplot2) #ggplot2 for mapping
library(ggspatial) #accessories to ggplot2

#plot communities from PNLT
ggplot() + 
  geom_sf(data = PNLT, 
          fill = "darkgreen", 
          color = "grey80"
          ) +
  geom_sf(data = Rivers, 
          color = 'darkblue', 
          size = 0.5
          ) +
  geom_sf(data = Communities, 
          color="white",
          shape=15, 
          size=2,
          stroke=FALSE
          ) +
  theme_light() + 
  coord_sf() + 
  guides( colour = guide_legend()
  ) +
  ggtitle('La Tigra National Park Communities') +
  theme(plot.title = element_text(size= 20, 
                              hjust=0.5, 
                              color = 'darkgreen',
                              face = 'bold')
  )  +
  annotation_scale() +
  annotation_north_arrow(location = "tr", 
                         which_north = "true", 
                         style = north_arrow_fancy_orienteering
                         )

Download Datasets

Convert sf objects to geopackage format

Although I would prefer we work our spatial analysis in R, in this way we ensure the reproductivility and access the great R Ecosystem. I understand that some people will like to use this spatial data in other software like QGIS, this can be done converting from the sf object, store in the package pnlt in rda format, to other spatial data formats such as geopackage. The function downloadLaTigra() make this possible in one step. The data will be downloaded into your working directory in a folder named PNLTdata, with 5 geopakage spatial databases named after the thematic groups used in the package.

library(pnlt) #load spatial data package
getwd() #Will give you the directory in your computer where the data will be stored.


#call function to download information into PNLTdata folder in your working directory
downloadLaTigra()

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Credits

Hexagon Sticker created using package hexSticker by Guangchuang YU

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