# Map biodiversity records with rgbif and dismo packages in R

**Vijay Barve**, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here)

Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.

In the earlier post we generated maps from GBIF biodiversity records using maps and ggplot2 packages. We used world map with country borders for that. Now we will generate maps with google maps as base layer using dismo package.

Like earlier we download data for *Danaus chrysippus *from GBIF using occurrencelist function into a data frame Dan_chr.

Then use dismo package which has function **gmap** to quickly download base layer maps form google and display it using **plot** function. We can specify the extent of map range we need to download using **extent** function and specifying Latitude and Longitude range. We plot the points first by converting them into Mercator system using** points**.

library(rgbif) Dan_chr=occurrencelist(sciname = 'Danaus chrysippus', coordinatestatus = TRUE, maxresults = 1000, latlongdf = TRUE, removeZeros = TRUE) library(dismo) e = extent( -179 , 179 , -80 , 80 ) r = gmap(e) plot(r, interpolate=TRUE, main="Map") xy1=cbind(Dan_chr$decimalLongitude,Dan_chr$decimalLatitud) points(Mercator(xy1) , col='blue', pch=20) text(160,0, "\n\n\nDanaus \nchrysippus", adj = c(0,1), col="red")

The output of the code snippet is as follows:

**leave a comment**for the author, please follow the link and comment on their blog:

**Vijay Barve**.

R-bloggers.com offers

**daily e-mail updates**about R news and tutorials about learning R and many other topics. Click here if you're looking to post or find an R/data-science job.

Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.