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@ -1,6 +1,5 @@
^.*\.Rproj$
^\.Rproj\.user$
^NEWS\.md$
^tools*$
^\.travis\.yml$
^appveyor\.yml$
@ -9,3 +8,4 @@
^\.lintr$
^opensensmapr_.*\.tar\.gz$
^cran-comments\.md$
^CRAN-SUBMISSION$

@ -4,7 +4,7 @@ This project does its best to adhere to semantic versioning.
### 2023-02-20: v0.6.0
- fix package bugs to pass CRAN tests after 4 years of maintenance break
- updated hyperlinks
- dont throw error for empty sensors
- don't throw error for empty sensors
- updated tests
- updated maintainer
- updated vignettes
@ -24,7 +24,7 @@ This project does its best to adhere to semantic versioning.
- add sensor-IDs to `box$phenomena`
### 2018-09-21: v0.4.3
- dynamically export S3 methods of forgeign generics
- dynamically export S3 methods of foreign generics
for compatibility with upcoming R 3.6.0
- add `readr` as default dependency
@ -74,7 +74,7 @@ This project does its best to adhere to semantic versioning.
### 2017-08-23: v0.2.0
- add auto paging for `osem_measurements()`, allowing data retrieval for arbitrary time intervals (#2)
- improve plots for `osem_measurements` & `sensebox` (#1)
- add `sensorId` & `unit` colummn to `get_measurements()` output by default
- add `sensorId` & `unit` column to `get_measurements()` output by default
- show download progress info, hide readr output
- shorten vignette `osem-intro`

@ -59,16 +59,16 @@ devtools::install_github('sensebox/opensensmapr@development') # bleeding edge ve
## Changelog
This project adheres to semantic versioning, for changes in recent versions please consult [CHANGES.md](CHANGES.md).
This project adheres to semantic versioning, for changes in recent versions please consult [NEWS.md](NEWS.md).
## Contributing & Development
Contributions are very welcome!
When submitting a patch, please follow the existing [code style](.lintr),
When submitting a patch, please follow the existing code stlye,
and run `R CMD check --no-vignettes .` on the package.
Where feasible, also add tests for the added / changed functionality in `tests/testthat`.
Please note that this project is released with a [Contributor Code of Conduct](CONDUCT.md).
Please note that this project is released with a Contributor Code of Conduct.
By participating in this project you agree to abide by its terms.
### development environment
@ -103,10 +103,10 @@ R CMD check --no-vignettes ../opensensmapr_*.tar.gz
To create a release:
0. make shure you are on master branch
0. make sure you are on master branch
1. run the tests and checks as described above
2. bump the version in `DESCRIPTION`
3. update `CHANGES.md`
3. update `NEWS.md`
3. rebuild the documentation: `R -e 'devtools::document()'`
4. build the package again with the new version: `R CMD build . --no-build-vignettes`
5. tag the commit with the new version: `git tag v0.5.0`

@ -1,4 +1,4 @@
## ----setup, results='hide', message=FALSE, warning=FALSE-----------------
## ----setup, results='hide', message=FALSE, warning=FALSE----------------------
# required packages:
library(opensensmapr) # data download
library(dplyr) # data wrangling
@ -6,12 +6,12 @@ library(ggplot2) # plotting
library(lubridate) # date arithmetic
library(zoo) # rollmean()
## ----download------------------------------------------------------------
## ----download-----------------------------------------------------------------
# if you want to see results for a specific subset of boxes,
# just specify a filter such as grouptag='ifgi' here
boxes = osem_boxes()
## ----exposure_counts, message=FALSE--------------------------------------
## ----exposure_counts, message=FALSE-------------------------------------------
exposure_counts = boxes %>%
group_by(exposure) %>%
mutate(count = row_number(createdAt))
@ -22,7 +22,7 @@ ggplot(exposure_counts, aes(x = createdAt, y = count, colour = exposure)) +
scale_colour_manual(values = exposure_colors) +
xlab('Registration Date') + ylab('senseBox count')
## ----exposure_summary----------------------------------------------------
## ----exposure_summary---------------------------------------------------------
exposure_counts %>%
summarise(
oldest = min(createdAt),
@ -31,11 +31,11 @@ exposure_counts %>%
) %>%
arrange(desc(count))
## ----grouptag_counts, message=FALSE--------------------------------------
## ----grouptag_counts, message=FALSE-------------------------------------------
grouptag_counts = boxes %>%
group_by(grouptag) %>%
# only include grouptags with 8 or more members
filter(length(grouptag) >= 8 && !is.na(grouptag)) %>%
filter(length(grouptag) >= 8 & !is.na(grouptag)) %>%
mutate(count = row_number(createdAt))
# helper for sorting the grouptags by boxcount
@ -49,7 +49,7 @@ ggplot(grouptag_counts, aes(x = createdAt, y = count, colour = grouptag)) +
geom_line(aes(group = grouptag)) +
xlab('Registration Date') + ylab('senseBox count')
## ----grouptag_summary----------------------------------------------------
## ----grouptag_summary---------------------------------------------------------
grouptag_counts %>%
summarise(
oldest = min(createdAt),
@ -58,7 +58,7 @@ grouptag_counts %>%
) %>%
arrange(desc(count))
## ----growthrate_registered, warning=FALSE, message=FALSE, results='hide'----
## ----growthrate_registered, warning=FALSE, message=FALSE, results='hide'------
bins = 'week'
mvavg_bins = 6
@ -68,7 +68,7 @@ growth = boxes %>%
summarize(count = length(week)) %>%
mutate(event = 'registered')
## ----growthrate_inactive, warning=FALSE, message=FALSE, results='hide'----
## ----growthrate_inactive, warning=FALSE, message=FALSE, results='hide'--------
inactive = boxes %>%
# remove boxes that were updated in the last two days,
# b/c any box becomes inactive at some point by definition of updatedAt
@ -78,7 +78,7 @@ inactive = boxes %>%
summarize(count = length(week)) %>%
mutate(event = 'inactive')
## ----growthrate, warning=FALSE, message=FALSE, results='hide'------------
## ----growthrate, warning=FALSE, message=FALSE, results='hide'-----------------
boxes_by_date = bind_rows(growth, inactive) %>% group_by(event)
ggplot(boxes_by_date, aes(x = as.Date(week), colour = event)) +
@ -89,7 +89,7 @@ ggplot(boxes_by_date, aes(x = as.Date(week), colour = event)) +
# moving average, make first and last value NA (to ensure identical length of vectors)
geom_line(aes(y = rollmean(count, mvavg_bins, fill = list(NA, NULL, NA))))
## ----exposure_duration, message=FALSE------------------------------------
## ----exposure_duration, message=FALSE-----------------------------------------
duration = boxes %>%
group_by(exposure) %>%
filter(!is.na(updatedAt)) %>%
@ -99,11 +99,11 @@ ggplot(duration, aes(x = exposure, y = duration)) +
geom_boxplot() +
coord_flip() + ylab('Duration active in Days')
## ----grouptag_duration, message=FALSE------------------------------------
## ----grouptag_duration, message=FALSE-----------------------------------------
duration = boxes %>%
group_by(grouptag) %>%
# only include grouptags with 8 or more members
filter(length(grouptag) >= 8 && !is.na(grouptag) && !is.na(updatedAt)) %>%
filter(length(grouptag) >= 8 & !is.na(grouptag) & !is.na(updatedAt)) %>%
mutate(duration = difftime(updatedAt, createdAt, units='days'))
ggplot(duration, aes(x = grouptag, y = duration)) +
@ -119,7 +119,7 @@ duration %>%
) %>%
arrange(desc(duration_avg))
## ----year_duration, message=FALSE----------------------------------------
## ----year_duration, message=FALSE---------------------------------------------
# NOTE: boxes older than 2016 missing due to missing updatedAt in database
duration = boxes %>%
mutate(year = cut(as.Date(createdAt), breaks = 'year')) %>%

@ -68,7 +68,7 @@ ggplot(exposure_counts, aes(x = createdAt, y = count, colour = exposure)) +
Outdoor boxes are growing *fast*!
We can also see the introduction of `mobile` sensor "stations" in 2017. While
mobile boxes are still few, we can expect a quick rise in 2018 once the new
[senseBox MCU with GPS support is released](https://sensebox.de/blog/2018-03-06-senseBox_MCU).
senseBox MCU with GPS support is released.
Let's have a quick summary:
```{r exposure_summary}
@ -93,7 +93,7 @@ inconsistent (`Luftdaten`, `luftdaten.info`, ...)
grouptag_counts = boxes %>%
group_by(grouptag) %>%
# only include grouptags with 8 or more members
filter(length(grouptag) >= 8 && !is.na(grouptag)) %>%
filter(length(grouptag) >= 8 & !is.na(grouptag)) %>%
mutate(count = row_number(createdAt))
# helper for sorting the grouptags by boxcount
@ -163,7 +163,7 @@ ggplot(boxes_by_date, aes(x = as.Date(week), colour = event)) +
We see a sudden rise in early 2017, which lines up with the fast growing grouptag `Luftdaten`.
This was enabled by an integration of openSenseMap.org into the firmware of the
air quality monitoring project [luftdaten.info](https://luftdaten.info).
air quality monitoring project [luftdaten.info](https://sensor.community/de/).
The dips in mid 2017 and early 2018 could possibly be explained by production/delivery issues
of the senseBox hardware, but I have no data on the exact time frames to verify.
@ -192,7 +192,7 @@ spanning a large chunk of openSenseMap's existence.
duration = boxes %>%
group_by(grouptag) %>%
# only include grouptags with 8 or more members
filter(length(grouptag) >= 8 && !is.na(grouptag) && !is.na(updatedAt)) %>%
filter(length(grouptag) >= 8 & !is.na(grouptag) & !is.na(updatedAt)) %>%
mutate(duration = difftime(updatedAt, createdAt, units='days'))
ggplot(duration, aes(x = grouptag, y = duration)) +

File diff suppressed because one or more lines are too long

@ -0,0 +1,162 @@
## ----setup, results='hide', message=FALSE, warning=FALSE----------------------
# required packages:
library(opensensmapr) # data download
library(dplyr) # data wrangling
library(ggplot2) # plotting
library(lubridate) # date arithmetic
library(zoo) # rollmean()
## ----download, results='hide', message=FALSE, warning=FALSE-------------------
# if you want to see results for a specific subset of boxes,
# just specify a filter such as grouptag='ifgi' here
boxes_all = osem_boxes()
boxes = boxes_all
## -----------------------------------------------------------------------------
boxes = filter(boxes, locationtimestamp >= "2022-01-01" & locationtimestamp <="2022-12-31")
summary(boxes) -> summary.data.frame
## ----message=F, warning=F-----------------------------------------------------
if (!require('maps')) install.packages('maps')
if (!require('maptools')) install.packages('maptools')
if (!require('rgeos')) install.packages('rgeos')
plot(boxes)
## -----------------------------------------------------------------------------
phenoms = osem_phenomena(boxes)
str(phenoms)
## -----------------------------------------------------------------------------
phenoms[phenoms > 50]
## ----exposure_counts, message=FALSE-------------------------------------------
exposure_counts = boxes %>%
group_by(exposure) %>%
mutate(count = row_number(locationtimestamp))
exposure_colors = c(indoor = 'red', outdoor = 'lightgreen', mobile = 'blue', unknown = 'darkgrey')
ggplot(exposure_counts, aes(x = locationtimestamp, y = count, colour = exposure)) +
geom_line() +
scale_colour_manual(values = exposure_colors) +
xlab('Registration Date') + ylab('senseBox count')
## ----exposure_summary---------------------------------------------------------
exposure_counts %>%
summarise(
oldest = min(locationtimestamp),
newest = max(locationtimestamp),
count = max(count)
) %>%
arrange(desc(count))
## ----grouptag_counts, message=FALSE-------------------------------------------
grouptag_counts = boxes %>%
group_by(grouptag) %>%
# only include grouptags with 15 or more members
filter(length(grouptag) >= 15 & !is.na(grouptag) & grouptag != '') %>%
mutate(count = row_number(locationtimestamp))
# helper for sorting the grouptags by boxcount
sortLvls = function(oldFactor, ascending = TRUE) {
lvls = table(oldFactor) %>% sort(., decreasing = !ascending) %>% names()
factor(oldFactor, levels = lvls)
}
grouptag_counts$grouptag = sortLvls(grouptag_counts$grouptag, ascending = FALSE)
ggplot(grouptag_counts, aes(x = locationtimestamp, y = count, colour = grouptag)) +
geom_line(aes(group = grouptag)) +
xlab('Registration Date') + ylab('senseBox count')
## ----grouptag_summary---------------------------------------------------------
grouptag_counts %>%
summarise(
oldest = min(locationtimestamp),
newest = max(locationtimestamp),
count = max(count)
) %>%
arrange(desc(count))
## ----growthrate_registered, warning=FALSE, message=FALSE, results='hide'------
bins = 'week'
mvavg_bins = 6
growth = boxes %>%
mutate(week = cut(as.Date(locationtimestamp), breaks = bins)) %>%
group_by(week) %>%
summarize(count = length(week)) %>%
mutate(event = 'registered')
## ----growthrate_inactive, warning=FALSE, message=FALSE, results='hide'--------
inactive = boxes %>%
# remove boxes that were updated in the last two days,
# b/c any box becomes inactive at some point by definition of updatedAt
filter(lastMeasurement < now() - days(2)) %>%
mutate(week = cut(as.Date(lastMeasurement), breaks = bins)) %>%
filter(as.Date(week) > as.Date("2021-12-31")) %>%
group_by(week) %>%
summarize(count = length(week)) %>%
mutate(event = 'inactive')
## ----growthrate, warning=FALSE, message=FALSE, results='hide'-----------------
boxes_by_date = bind_rows(growth, inactive) %>% group_by(event)
ggplot(boxes_by_date, aes(x = as.Date(week), colour = event)) +
xlab('Time') + ylab(paste('rate per ', bins)) +
scale_x_date(date_breaks="years", date_labels="%Y") +
scale_colour_manual(values = c(registered = 'lightgreen', inactive = 'grey')) +
geom_point(aes(y = count), size = 0.5) +
# moving average, make first and last value NA (to ensure identical length of vectors)
geom_line(aes(y = rollmean(count, mvavg_bins, fill = list(NA, NULL, NA))))
## ----table_mostregistrations--------------------------------------------------
boxes_by_date %>%
filter(count > 50) %>%
arrange(desc(count))
## ----exposure_duration, message=FALSE-----------------------------------------
durations = boxes %>%
group_by(exposure) %>%
filter(!is.na(lastMeasurement)) %>%
mutate(duration = difftime(lastMeasurement, locationtimestamp, units='days')) %>%
filter(duration >= 0)
ggplot(durations, aes(x = exposure, y = duration)) +
geom_boxplot() +
coord_flip() + ylab('Duration active in Days')
## ----grouptag_duration, message=FALSE-----------------------------------------
durations = boxes %>%
filter(!is.na(lastMeasurement)) %>%
group_by(grouptag) %>%
# only include grouptags with 20 or more members
filter(length(grouptag) >= 15 & !is.na(grouptag) & !is.na(lastMeasurement)) %>%
mutate(duration = difftime(lastMeasurement, locationtimestamp, units='days')) %>%
filter(duration >= 0)
ggplot(durations, aes(x = grouptag, y = duration)) +
geom_boxplot() +
coord_flip() + ylab('Duration active in Days')
durations %>%
summarize(
duration_avg = round(mean(duration)),
duration_min = round(min(duration)),
duration_max = round(max(duration)),
oldest_box = round(max(difftime(now(), locationtimestamp, units='days')))
) %>%
arrange(desc(duration_avg))
## ----year_duration, message=FALSE---------------------------------------------
# NOTE: boxes older than 2016 missing due to missing updatedAt in database
duration = boxes %>%
mutate(year = cut(as.Date(locationtimestamp), breaks = 'year')) %>%
group_by(year) %>%
filter(!is.na(lastMeasurement)) %>%
mutate(duration = difftime(lastMeasurement, locationtimestamp, units='days')) %>%
filter(duration >= 0)
ggplot(duration, aes(x = substr(as.character(year), 0, 4), y = duration)) +
geom_boxplot() +
coord_flip() + ylab('Duration active in Days') + xlab('Year of Registration')

@ -1,5 +1,5 @@
---
title: "Visualising the Develpment of openSenseMap.org in 2022"
title: "Visualising the Development of openSenseMap.org in 2022"
author: "Jan Stenkamp"
date: '`r Sys.Date()`'
output:
@ -15,7 +15,7 @@ output:
fig_width: 7
toc: yes
vignette: >
%\VignetteIndexEntry{Visualising the History of openSenseMap.org}
%\VignetteIndexEntry{Visualising the Development of openSenseMap.org in 2022}
%\VignetteEncoding{UTF-8}
%\VignetteEngine{knitr::rmarkdown}
---
@ -25,9 +25,7 @@ vignette: >
```{r setup, results='hide', message=FALSE, warning=FALSE}
# required packages:
# library(opensensmapr) # data download
library(devtools)
load_all(".")
library(opensensmapr) # data download
library(dplyr) # data wrangling
library(ggplot2) # plotting
library(lubridate) # date arithmetic
@ -140,7 +138,7 @@ inconsistent (`Luftdaten`, `luftdaten.info`, ...)
grouptag_counts = boxes %>%
group_by(grouptag) %>%
# only include grouptags with 15 or more members
filter(length(grouptag) >= 15 && !is.na(grouptag) && grouptag != '') %>%
filter(length(grouptag) >= 15 & !is.na(grouptag) & grouptag != '') %>%
mutate(count = row_number(locationtimestamp))
# helper for sorting the grouptags by boxcount

File diff suppressed because one or more lines are too long

@ -1,41 +1,41 @@
## ----setup, include=FALSE------------------------------------------------
## ----setup, include=FALSE-----------------------------------------------------
knitr::opts_chunk$set(echo = TRUE)
## ----results = F---------------------------------------------------------
## ----results = F--------------------------------------------------------------
library(magrittr)
library(opensensmapr)
all_sensors = osem_boxes()
## ------------------------------------------------------------------------
## -----------------------------------------------------------------------------
summary(all_sensors)
## ----message=F, warning=F------------------------------------------------
## ----message=F, warning=F-----------------------------------------------------
if (!require('maps')) install.packages('maps')
if (!require('maptools')) install.packages('maptools')
if (!require('rgeos')) install.packages('rgeos')
plot(all_sensors)
## ------------------------------------------------------------------------
## -----------------------------------------------------------------------------
phenoms = osem_phenomena(all_sensors)
str(phenoms)
## ------------------------------------------------------------------------
## -----------------------------------------------------------------------------
phenoms[phenoms > 20]
## ----results = F---------------------------------------------------------
## ----results = F--------------------------------------------------------------
pm25_sensors = osem_boxes(
exposure = 'outdoor',
date = Sys.time(), # ±4 hours
phenomenon = 'PM2.5'
)
## ------------------------------------------------------------------------
## -----------------------------------------------------------------------------
summary(pm25_sensors)
plot(pm25_sensors)
## ------------------------------------------------------------------------
## -----------------------------------------------------------------------------
library(sf)
library(units)
library(lubridate)
@ -49,25 +49,25 @@ berlin = st_point(c(13.4034, 52.5120)) %>%
st_transform(4326) %>% # the opensensemap expects WGS 84
st_bbox()
## ----results = F---------------------------------------------------------
## ----results = F--------------------------------------------------------------
pm25 = osem_measurements(
berlin,
phenomenon = 'PM2.5',
from = now() - days(20), # defaults to 2 days
from = now() - days(3), # defaults to 2 days
to = now()
)
plot(pm25)
## ------------------------------------------------------------------------
## -----------------------------------------------------------------------------
outliers = filter(pm25, value > 100)$sensorId
bad_sensors = outliers[, drop = T] %>% levels()
pm25 = mutate(pm25, invalid = sensorId %in% bad_sensors)
## ------------------------------------------------------------------------
## -----------------------------------------------------------------------------
st_as_sf(pm25) %>% st_geometry() %>% plot(col = factor(pm25$invalid), axes = T)
## ------------------------------------------------------------------------
## -----------------------------------------------------------------------------
pm25 %>% filter(invalid == FALSE) %>% plot()

@ -18,7 +18,7 @@ knitr::opts_chunk$set(echo = TRUE)
```
This package provides data ingestion functions for almost any data stored on the
open data platform for environemental sensordata <https://opensensemap.org>.
open data platform for environmental sensordata <https://opensensemap.org>.
Its main goals are to provide means for:
- big data analysis of the measurements stored on the platform
@ -97,7 +97,7 @@ Thats still more than 200 measuring stations, we can work with that.
### Analyzing sensor data
Having analyzed the available data sources, let's finally get some measurements.
We could call `osem_measurements(pm25_sensors)` now, however we are focussing on
We could call `osem_measurements(pm25_sensors)` now, however we are focusing on
a restricted area of interest, the city of Berlin.
Luckily we can get the measurements filtered by a bounding box:
@ -119,7 +119,7 @@ berlin = st_point(c(13.4034, 52.5120)) %>%
pm25 = osem_measurements(
berlin,
phenomenon = 'PM2.5',
from = now() - days(20), # defaults to 2 days
from = now() - days(3), # defaults to 2 days
to = now()
)

File diff suppressed because one or more lines are too long

@ -1,10 +1,10 @@
## ----setup, results='hide'-----------------------------------------------
## ----setup, results='hide'----------------------------------------------------
# this vignette requires:
library(opensensmapr)
library(jsonlite)
library(readr)
## ----cache---------------------------------------------------------------
## ----cache--------------------------------------------------------------------
b = osem_boxes(grouptag = 'ifgi', cache = tempdir())
# the next identical request will hit the cache only!
@ -13,31 +13,31 @@ b = osem_boxes(grouptag = 'ifgi', cache = tempdir())
# requests without the cache parameter will still be performed normally
b = osem_boxes(grouptag = 'ifgi')
## ----cachelisting--------------------------------------------------------
## ----cachelisting-------------------------------------------------------------
list.files(tempdir(), pattern = 'osemcache\\..*\\.rds')
## ----cache_custom--------------------------------------------------------
## ----cache_custom-------------------------------------------------------------
cacheDir = getwd() # current working directory
b = osem_boxes(grouptag = 'ifgi', cache = cacheDir)
# the next identical request will hit the cache only!
b = osem_boxes(grouptag = 'ifgi', cache = cacheDir)
## ----clearcache----------------------------------------------------------
osem_clear_cache() # clears default cache
## ----clearcache, results='hide'-----------------------------------------------
osem_clear_cache() # clears default cache
osem_clear_cache(getwd()) # clears a custom cache
## ----data, results='hide'------------------------------------------------
## ----data, results='hide'-----------------------------------------------------
# first get our example data:
measurements = osem_measurements('Windrichtung')
measurements = osem_measurements('Windgeschwindigkeit')
## ----serialize_json------------------------------------------------------
## ----serialize_json-----------------------------------------------------------
# serializing senseBoxes to JSON, and loading from file again:
write(jsonlite::serializeJSON(measurements), 'measurements.json')
measurements_from_file = jsonlite::unserializeJSON(readr::read_file('measurements.json'))
class(measurements_from_file)
## ----serialize_attrs-----------------------------------------------------
## ----serialize_attrs----------------------------------------------------------
# note the toJSON call instead of serializeJSON
write(jsonlite::toJSON(measurements), 'measurements_bad.json')
measurements_without_attrs = jsonlite::fromJSON('measurements_bad.json')
@ -46,6 +46,6 @@ class(measurements_without_attrs)
measurements_with_attrs = osem_as_measurements(measurements_without_attrs)
class(measurements_with_attrs)
## ----cleanup, include=FALSE----------------------------------------------
## ----cleanup, include=FALSE---------------------------------------------------
file.remove('measurements.json', 'measurements_bad.json')

@ -73,7 +73,7 @@ here's how:
```{r data, results='hide'}
# first get our example data:
measurements = osem_measurements('Windrichtung')
measurements = osem_measurements('Windgeschwindigkeit')
```
If you are paranoid and worry about `.rds` files not being decodable anymore

File diff suppressed because one or more lines are too long

@ -1,5 +1,5 @@
---
title: "Visualising the Develpment of openSenseMap.org in 2022"
title: "Visualising the Development of openSenseMap.org in 2022"
author: "Jan Stenkamp"
date: '`r Sys.Date()`'
output:
@ -15,7 +15,7 @@ output:
fig_width: 7
toc: yes
vignette: >
%\VignetteIndexEntry{Visualising the Develpment of openSenseMap.org in 2022}
%\VignetteIndexEntry{Visualising the Development of openSenseMap.org in 2022}
%\VignetteEncoding{UTF-8}
%\VignetteEngine{knitr::rmarkdown}
---

@ -18,7 +18,7 @@ knitr::opts_chunk$set(echo = TRUE)
```
This package provides data ingestion functions for almost any data stored on the
open data platform for environemental sensordata <https://opensensemap.org>.
open data platform for environmental sensordata <https://opensensemap.org>.
Its main goals are to provide means for:
- big data analysis of the measurements stored on the platform

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