diff --git a/R/katastry.R b/R/katastry.R
index ab688c5..df764dc 100644
--- a/R/katastry.R
+++ b/R/katastry.R
@@ -21,6 +21,22 @@
 #'
 #' @source © ČÚZK, 2024 <https://vdp.cuzk.cz/>
 #'
+#' @examples
+#'
+#' \donttest{
+#' library(sf)
+#'
+#' # which cadastral area of Prague is the smallest?
+#' praha <- RCzechia::katastry() |>
+#'    subset(NAZ_OBEC == "Praha")
+#'
+#' smallest <- which.min(sf::st_area(praha))
+#'
+#' # it is Josefov - the former Jewish Ghetto
+#' mapview::mapview(praha[smallest, ])
+#'
+#' }
+#'
 #' @export
 
 katastry <- function() {
diff --git a/cran-comments.md b/cran-comments.md
index c71f3a4..8073d17 100644
--- a/cran-comments.md
+++ b/cran-comments.md
@@ -1,15 +1,14 @@
 ## Test environments
-* Ubuntu 22.04.1 LTS, 4.3.1 (2023-06-16) GEOS 3.12.0, GDAL 3.7.2, PROJ 9.3.0 (current)
-* Ubuntu 18.04.6 LTS, R version 3.6.3 GEOS 3.6.2, GDAL 2.2.3, PROJ 4.9.3 (lowest supported)
+* Ubuntu 22.04.1 LTS, R version 4.4.1 (2024-06-14) GEOS 3.12.0, GDAL 3.7.2, PROJ 9.3.0 (current)
 
-* Ubuntu 22.04.3 LTS, 4.3.1 (2023-06-16) (GitHub Actions)
-* Ubuntu 22.04.3 LTS, R Under development (unstable) (2023-10-27 r85420) (GitHub Actions)
-* Windows Server 2022 10.0.20348, R version 4.3.1 (2023-06-16 ucrt) (GitHub Actions)
-* Mac OS X 12.6.3, R version 4.3.1 (2023-06-16) (GitHub Actions)
+* Ubuntu 22.04.3 LTS, R version 4.4.1 (2024-06-14) (GitHub Actions)
+* Ubuntu 22.04.3 LTS,  R Under development (unstable) (2024-07-07 r86880) (GitHub Actions)
+* Windows Server 2022 10.0.20348, R version 4.4.1 (2024-06-14 ucrt) (GitHub Actions)
+* Mac OS X 12.6.3, R version 4.4.1 (2024-06-14) (GitHub Actions)
 
-* Windows R version 4.3.1 (2023-06-16 ucrt) (win builder)
-* Windows R Under development (unstable) (2023-10-28 r85429 ucrt) (win builder) 
-* Windows R version 4.2.3 (2023-03-15 ucrt) (win builder)
+* Windows R version 4.4.1 (2024-06-14 ucrt) (win builder)
+* Windows R Under development (unstable) (2024-07-11 r86890 ucrt) (win builder) 
+* Windows R version 4.3.3 (2024-02-29 ucrt) (win builder)
 
 ## R CMD check results
 Status: OK
diff --git a/man/katastry.Rd b/man/katastry.Rd
index 667c86f..8929b21 100644
--- a/man/katastry.Rd
+++ b/man/katastry.Rd
@@ -30,3 +30,20 @@ The dataset is based on RUIAN data by the Czech cadastral office. If necessary y
 
 The data is current to June 2024. Downloaded size is 26.1 MB.
 }
+\examples{
+
+\donttest{
+library(sf)
+
+# which cadastral area of Prague is the smallest?
+praha <- RCzechia::katastry() |>
+   subset(NAZ_OBEC == "Praha")
+
+smallest <- which.min(sf::st_area(praha))
+
+# it is Josefov - the former Jewish Ghetto
+mapview::mapview(praha[smallest, ])
+
+}
+
+}
diff --git a/tests/testthat/test-1-katastr.R b/tests/testthat/test-1-katastr.R
index e8b6d4a..2a6a4c1 100644
--- a/tests/testthat/test-1-katastr.R
+++ b/tests/testthat/test-1-katastr.R
@@ -24,4 +24,8 @@ test_that("katastrální území", {
   # sloupce se nerozbily...
   expect_equal(colnames(katastry()), c("KOD", "NAZEV", "KOD_OBEC", "NAZ_OBEC", "digi", "geometry"))
 
+  # území je pokryté
+  expect_equal(sum(st_area(katastry())), st_area(republika("high")), tolerance = 5/100)
+
+
 })