Data Cards / Data Card

Air quality Freiburg, hourly (demo)

Hourly NO2, PM10, PM2.5 and temperature at three stations, 14 days. Synthetic values with a few gaps and outliers.

DEMO: synthetic dataset generated by nexCARDData Card as JSON PDF report (nexEDP)EDP profile (raw)

Key figures

1,008rows

6columns (4 numeric, 1 date, 1 text)

99.8 %complete cells (10 missing)

0 %inconsistent cells

0.7 %outliers in numeric cells (IQR)

53.6 KBCSV file

Time range: 2026-09-01 00:00 to 2026-09-14 23:00

Correlations: 1 strong, 0 partial, 5 none · Describes the data. It does not rate it.

Columns

Column	Type	Missing	Unique	Min	Median	Mean	Max	Std. dev.	Outliers (IQR)	Notes
no2_ugm3	numeric (Float32)	10	317	14	27.95	28.98	55.7	9.06	18	distribution rayleigh
pm10_ugm3	numeric (Float32)	0	96	11	15.45	15.72	79.9	5	5	distribution uniform
pm25_ugm3	numeric (Float32)	0	79	6.9	10.5	10.75	50.9	3.14	5	distribution exponpow
temperature_c	numeric (Float32)	0	136	10	16.8	16.76	23.5	4.28	0	distribution uniform
timestamp	datetime	0	336	–	–	–	–	–	–	format ISO8601 · 2026-09-01 00:00 to 2026-09-14 23:00
station	text	0	3	–	–	–	–	–	–

No sample values: the card shows no single values of the dataset.

Charts (nexEDP)

Box plot of no2_ugm3 — Box plot: no2_ugm3

Box plot of pm10_ugm3 — Box plot: pm10_ugm3

Box plot of pm25_ugm3 — Box plot: pm25_ugm3

Box plot of temperature_c — Box plot: temperature_c

Distribution of no2_ugm3 — Distribution: no2_ugm3

Distribution of pm10_ugm3 — Distribution: pm10_ugm3

Distribution of pm25_ugm3 — Distribution: pm25_ugm3

Distribution of temperature_c — Distribution: temperature_c

Governance

SHA-256	`37e3aaa43fe89ce6518597d815fdeb736fa75de744cf4a3db3c6a3fc5a10591a`nexCARDsame value at nexEDP
Retrieved at	2026-10-26 18:58 UTCnexCARD
Source file	`air-quality-freiburg-demo.csv` · 53.6 KB · text/csv
License	CC-BY-4.0uploader, not checked
Publisher	DEMO: City of Freiburg (synthetic)uploader, not checked
Provenance	DEMO: generated by nexCARD, modelled on the DRF data cards Freiburguploader, not checked
Policy	DEMO: no policy. nexus would deliver the Authorization Profile of the Resource.DEMO
Data product	DEMO: not linked. nexDS would deliver the Data product and Resource.DEMO
Workspace	DEMO: nexyoDEMO
Visibility	DEMO: public. Review and release by card:manager follows with the Hub connection.DEMO
Profile	EDP Service @ 1.2.12.dev0+gab54baf98.d20260407 · EDP schema 1.2.2.dev1+gbf7a976f1
Card	Version 1 · created 2026-10-26 18:58 UTC · `898dd8ef-c8e2-4436-b1df-6094d325d0ef`

Labels: nexEDP/nexCARD computed · uploader, not checked typed in at the start · DEMO nexDS and nexus will deliver this value after the Hub connection.