detectionMaps function

[la...@wwf.panda.org]

Hi Jürgen,

For species presence map, am hoping the detectionMaps function could be expanded to display spatial polygon. (See image attached)

Thanks :)

[Juergen Niedballa]

Hi,
thanks for the suggestion. This should be relatively easy to implement. I will try to include it in the next release.
Jürgen

[Chloe Nouzille]

Hello,

I was wondering how you made your map look so nice?

 Is all that done just with the detectionMaps function? My legend right now is not particularly legible...

deerMap <- detectionMaps(CTtable = camtraps,
                          recordTable = deerRec, 
                          Xcol = "utm_x",
                          Ycol = "utm_y",
                         backgroundPolygon = poly3,
                          stationCol = "Station",
                          speciesCol = "Species",
                          writePNG = FALSE,
                          plotR = TRUE,
                          printLabels = F,
                          richnessPlot = F,
                          addLegend = TRUE        
)

Thank you!!

-Chloe

[Juergen Niedballa]

Hi Chloe,

the detectionMaps function is very basic. The prettier map above was created with GIS software, which I'd recommend over detectionMaps for publication-quality figures. detectionMaps can create shapefiles though, so you get the input for maps in GIS. 

For prettier maps in R, try the mapview example from vignette 4. 

Best regards,

Jürgen

[Juergen Niedballa]

When setting argument writeShapefile = TRUE, the output of detectionMaps is an sf object (from the sf package), which can be plotted easily using ggplot2 via geom_sf(). One can also add other spatial layers to these plots with further calls to geom_sf().