| Title: | Early Warning Information on Landslides in Sri Lanka During the Ditwah Storm |
| Version: | 1.2.0 |
| Description: | Provides curated early warning data on landslides in Sri Lanka during the Ditwah storm. It includes structured, machine-readable tidy dataset. This is developed for education and research purposes. |
| License: | GPL (≥ 3) |
| Imports: | dplyr, ggplot2, lubridate, plotly, stringr, shiny |
| Encoding: | UTF-8 |
| RoxygenNote: | 7.3.3 |
| Depends: | R (≥ 4.1.0) |
| LazyData: | true |
| NeedsCompilation: | no |
| Packaged: | 2026-01-21 16:55:18 UTC; DELL |
| Author: | Thiyanga S. Talagala
 [aut, cre],
Geethma R. Jayasinghe [aut],
Y. M. Amali P. Rajapaksha [aut],
N. G. Shehara Minimuthu [aut],
Y. G. D. M. Savindya Thathsarani [aut] |
| Maintainer: | Thiyanga S. Talagala <ttalagala@sjp.ac.lk> |
| Repository: | CRAN |
| Date/Publication: | 2026-01-26 16:40:09 UTC |
Landslide early warning messages during Ditwah strom in November, 2025
Description
A dataset containing early warning messages for landslide-prone areas, including report details, validity periods, locations, and warning levels.
Usage
ditwah_landslides_warnings
Format
A data frame with the following variables:
- ID_DataAnalyst
chr. Identifier of the data analyst- Report_Date
dttm. Date on which the landslide early warning report was issued.- Report_Time
chr. Time at which the report was issued, in HH:MM format.- Message_ID
chr. Unique identifier for each warning message. Encodes the warning type, date, time, and message sequence.- Valid_From_Date
dttm. Start date from which the warning is valid.- Valid_From_Time
chr. Start time from which the warning is valid, in HH:MM format.- Valid_To_Date
dttm. End date until which the warning remains valid.- Valid_To_Time
chr. End time until which the warning remains valid, in HH:MM format.- District
chr. Administrative district where the potential landslide risk has been identified.- Location
chr. Specific locality, town, or area within the district affected by the warning.- Level
dbl. Landslide early warning level (1 = Level 1, 2 = Level 2, 3 = Level 3). Represents the severity of the situation.- State
dbl. Direction and magnitude of the landslide (1-shifted one level up, 2-shifted two levels up, -1-shifted one level down, -2-shifted two levels down).- Province
Province
Source
Based on land slides early warning pdf reports published by Disaster Management Centre, Sri Lanka. The data from PDF files were cleaned and processes by the package authors. Accessed from https://www.dmc.gov.lk/index.php?option=com_dmcreports&view=reports&Itemid=276&report_type_id=5&lang=en
Launch the Landslides Warnings Shiny Application
Description
This function launches the Shiny application included in the
ditwahLandslide package. The app must be located in
inst/app/ within the package source. When installed, this
directory is available via system.file().
Usage
run_app(...)
Arguments
... |
Additional arguments passed to |
Value
The Shiny app is launched; no R object is returned.
Examples
if (interactive()) {
run_app()
}
Heatmap of Transitions Between Landslide Warning Levels
Description
Temporal progression of landslide warning state
Usage
viz_landslide_warnings_from_to(
data,
district = NULL,
province = NULL,
interactivity = TRUE,
ang = 90
)
Arguments
data |
name of the dataset, by default ditwah_landslides_warnings |
district |
District name or All, if no district put NULL |
province |
Province name or All, if no province put NULL |
interactivity |
if TRUE interactive plot will be generated, if FALSE static plot will be generated |
ang |
angle of the x-axis lables |
Value
Heatmap plot of landslide warnings
Author(s)
Thiyanga S. Talagala, Geethma R. Jayasinghe, Y. M. Amali P. Rajapaksha