Feature Requests

[RobinCGN]

@VicluUiB requested a couple of features:

• Export of plots as images

• Smoothing of Isolines similar to QGIS/MapInfo results ("Your Isolines look like LEGO!")

• Export of semi-variogram statistics (range, sill, etc.)

[RobinCGN]

1. I have added an experimental image export function (plot to *.svg, raster maps to *.tif) to 03_Visualisation_Export.R.

2. Smoothing of isolines can be achieved using the smoothr package. Of course the smoothed isolines are just for visualization, not for counting sites or calculating areas!!!

install.packages("smoothr")
require(sp)
require(smoothr)

convert polygons to lines
isoline_merged_lines <- as(isoline_merged, 'SpatialLinesDataFrame')

smooth isolines or polygons (smoothness can be adjusted)
iso_merged_lines_smo <- smooth(isoline_merged_lines, method = "ksmooth", smoothness = 2) iso_merged_poly_smo <- smooth(isoline_merged, method = "ksmooth", smoothness = 2)

export

`rgdal::writeOGR(iso_merged_lines_smo,`
                dsn = "playground",
                layer = "iso_merged_lines_smo",
                driver = "ESRI Shapefile",
                check_exists = TRUE,
                overwrite_layer = TRUE)

rgdal::writeOGR(iso_merged_poly_smo,
                dsn = "playground",
                layer = "iso_merged_poly_smo",
                driver = "ESRI Shapefile",
                check_exists = TRUE,
                overwrite_layer = TRUE)

[Mono2]

I used smoothr in a previous version of my local script. In the end, however, I decided not to smooth the isolines, although it looks "nicer". The difference in the statistical values is considerable.
My suggestion would be that the calculation of the statistical values is always based on the non-smoothed isolines and that there is the option of having smoothed isolines on the images or in the export of the shape-filese.

[RobinCGN]

You're absolutely right, smoothed isolines shouldn't be used for any kind of calculations. Now that you agree, will add this feature as option in the next days, but I don't know how the package dependencies stuff (deps.yaml) works.

[Mono2]

No Problem. I will update it when you are finished.

[VicluUiB]

Thank you both for keeping me updated with all the fantastic work that you're doing! Sorry that I cannot contribute much more at the moment other than by running it with my own sets of data.

As far as smoothing of the isolines go, I agree. However, it would be a great function to have as it would make more sense to illustrate the outputs in this way when making figures for e.g. publication or other types of dissemination.

[RobinCGN]

I have added the smoothing of isolines to the regular script. I made it optional or rather dependent on "merge polygons". If the "merge-polygons"-option is "TRUE", a .shp with smoothed isolines is produced.