diff --git a/DESCRIPTION b/DESCRIPTION
index 44f61fa8..fe73883e 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -12,12 +12,12 @@ Authors@R: c(
     )
 Description: A Mechanism/Machine for Data, Environments, and User Setup package for health and climate research. It is fully tested, versioned, and open source and open access.
 Depends: R (>= 4.1.0)
-Imports: dplyr, sf, stats, terra, methods, data.table, httr, rvest, exactextractr, utils, stringr, testthat (>= 3.0.0), doParallel, parallelly, stars, foreach, future
-Suggests: covr, withr, knitr, rmarkdown, sftime, lwgeom, FNN, doRNG
+Imports: dplyr, sf, sftime, stats, terra, methods, data.table, httr, rvest, exactextractr, utils, stringr, testthat (>= 3.0.0), doParallel, parallelly, stars, foreach, future
+Suggests: covr, withr, knitr, rmarkdown, lwgeom, FNN, doRNG
 Encoding: UTF-8
 VignetteBuilder: knitr, rmarkdown
 Roxygen: list(markdown = TRUE)
-RoxygenNote: 7.3.0
+RoxygenNote: 7.3.1
 Config/Needs/website: tidyverse/tidytemplate
 Config/testhat/edition: 3
 License: MIT + file LICENSE
diff --git a/NAMESPACE b/NAMESPACE
index 92d8da21..730f0285 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -9,6 +9,8 @@ export(calc_nlcd_ratio)
 export(calc_temporal_dummies)
 export(calc_tri)
 export(check_for_null_parameters)
+export(check_mysf)
+export(check_mysftime)
 export(check_url_status)
 export(check_urls)
 export(convert_stdt)
@@ -54,6 +56,8 @@ export(modis_worker)
 export(read_commands)
 export(test_download_functions)
 import(rvest)
+import(sf)
+import(sftime)
 importFrom(data.table,.SD)
 importFrom(data.table,as.data.table)
 importFrom(data.table,fread)
diff --git a/R/download_test_support.R b/R/download_test_support.R
index 2115c165..e8bf1032 100644
--- a/R/download_test_support.R
+++ b/R/download_test_support.R
@@ -26,7 +26,7 @@ check_url_status <- function(
   }
 
   status <- hd$status_code
-  Sys.sleep(0.5)
+  Sys.sleep(2)
   return(status == http_status_ok)
 }
 
diff --git a/R/manipulate_spacetime_data.R b/R/manipulate_spacetime_data.R
index 975f3ab0..2a33c997 100644
--- a/R/manipulate_spacetime_data.R
+++ b/R/manipulate_spacetime_data.R
@@ -122,6 +122,43 @@ is_stdt <- function(obj) {
   }
 }
 
+#' Check if the sftime object is formated on a specific way
+#'
+#' @param x a sftime object
+#' @import sftime
+#' @author Eva Marques
+#' @export
+check_mysftime <- function(x) {
+  stopifnot(
+    "x is not a sftime" = class(x)[1] == "sftime",
+    "x is not inherited from a data.table" =
+      class(x)[3] == "data.table",
+    "time column should be called time" =
+      attributes(x)$time_column == "time",
+    "geometry column should be called geometry" =
+      attributes(x)$sf_column == "geometry",
+    "geometry is not a sfc_POINT" = class(x$geometry)[1] == "sfc_POINT"
+  )
+}
+
+#' Check if the sf object is formated on a specific way
+#'
+#' @param x a sf object
+#' @import sf
+#' @author Eva Marques
+#' @export
+check_mysf <- function(x) {
+  stopifnot(
+    "x is not a sf" = class(x)[1] == "sf",
+    "x is not inherited from a data.table" =
+      class(x)[2] == "data.table",
+    "geometry column should be called geometry" =
+      attributes(x)$sf_column == "geometry",
+    "geometry is not a sfc_POINT" = class(x$geometry)[1] == "sfc_POINT"
+  )
+}
+
+
 
 #' Convert a stdt to sf/sftime/SpatVector
 #' @param stdt A stdt object
diff --git a/man/check_mysf.Rd b/man/check_mysf.Rd
new file mode 100644
index 00000000..db7372e6
--- /dev/null
+++ b/man/check_mysf.Rd
@@ -0,0 +1,17 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/manipulate_spacetime_data.R
+\name{check_mysf}
+\alias{check_mysf}
+\title{Check if the sf object is formated on a specific way}
+\usage{
+check_mysf(x)
+}
+\arguments{
+\item{x}{a sf object}
+}
+\description{
+Check if the sf object is formated on a specific way
+}
+\author{
+Eva Marques
+}
diff --git a/man/check_mysftime.Rd b/man/check_mysftime.Rd
new file mode 100644
index 00000000..a3b1f52a
--- /dev/null
+++ b/man/check_mysftime.Rd
@@ -0,0 +1,17 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/manipulate_spacetime_data.R
+\name{check_mysftime}
+\alias{check_mysftime}
+\title{Check if the sftime object is formated on a specific way}
+\usage{
+check_mysftime(x)
+}
+\arguments{
+\item{x}{a sftime object}
+}
+\description{
+Check if the sftime object is formated on a specific way
+}
+\author{
+Eva Marques
+}
diff --git a/tests/testdata/spacetime_table.csv b/tests/testdata/spacetime_table.csv
new file mode 100644
index 00000000..0b3418a1
--- /dev/null
+++ b/tests/testdata/spacetime_table.csv
@@ -0,0 +1,28 @@
+id,lat,lon,time,var1,var2
+3804,39.349998,-81.433334,1990-01-01T00:00:00Z,35,Tmax
+3804,39.349998,-81.433334,1990-01-02T00:00:00Z,42,Tmax
+3804,39.349998,-81.433334,1990-01-03T00:00:00Z,49,Tmax
+3810,35.733334,-81.383331,1990-01-01T00:00:00Z,55,Tmax
+3810,35.733334,-81.383331,1990-01-02T00:00:00Z,45,Tmax
+3810,35.733334,-81.383331,1990-01-03T00:00:00Z,59,Tmax
+3811,35.599998,-88.916664,1990-01-01T00:00:00Z,45,Tmax
+3811,35.599998,-88.916664,1990-01-02T00:00:00Z,46,Tmax
+3811,35.599998,-88.916664,1990-01-03T00:00:00Z,60,Tmax
+3804,39.349998,-81.433334,1990-01-01T00:00:00Z,35,Tmin
+3804,39.349998,-81.433334,1990-01-02T00:00:00Z,42,Tmin
+3804,39.349998,-81.433334,1990-01-03T00:00:00Z,49,Tmin
+3810,35.733334,-81.383331,1990-01-01T00:00:00Z,55,Tmin
+3810,35.733334,-81.383331,1990-01-02T00:00:00Z,45,Tmin
+3810,35.733334,-81.383331,1990-01-03T00:00:00Z,59,Tmin
+3811,35.599998,-88.916664,1990-01-01T00:00:00Z,45,Tmin
+3811,35.599998,-88.916664,1990-01-02T00:00:00Z,46,Tmin
+3811,35.599998,-88.916664,1990-01-03T00:00:00Z,60,Tmin
+3804,39.349998,-81.433334,1990-01-01T00:00:00Z,0,Precip
+3804,39.349998,-81.433334,1990-01-02T00:00:00Z,0,Precip
+3804,39.349998,-81.433334,1990-01-03T00:00:00Z,0.0099999998,Precip
+3810,35.733334,-81.383331,1990-01-01T00:00:00Z,0,Precip
+3810,35.733334,-81.383331,1990-01-02T00:00:00Z,0,Precip
+3810,35.733334,-81.383331,1990-01-03T00:00:00Z,0,Precip
+3811,35.599998,-88.916664,1990-01-01T00:00:00Z,0,Precip
+3811,35.599998,-88.916664,1990-01-02T00:00:00Z,0,Precip
+3811,35.599998,-88.916664,1990-01-03T00:00:00Z,0.81999998,Precip
diff --git a/tests/testthat/test-download_functions.R b/tests/testthat/test-download_functions.R
index eff91a39..0d8ecbd6 100644
--- a/tests/testthat/test-download_functions.R
+++ b/tests/testthat/test-download_functions.R
@@ -288,7 +288,7 @@ testthat::test_that("MERRA2 download URLs have HTTP status 200.", {
     # extract urls
     urls <- extract_urls(commands = commands, position = 2)
     # check HTTP URL status
-    url_status <- check_urls(urls = urls, size = 30L, method = "HEAD")
+    url_status <- check_urls(urls = urls, size = 3L, method = "HEAD")
     # implement unit tests
     test_download_functions(directory_to_save = directory_to_save,
                             commands_path = commands_path,
diff --git a/tests/testthat/test-manipulate_spacetime_data.R b/tests/testthat/test-manipulate_spacetime_data.R
index 7958522a..ca6a6e44 100644
--- a/tests/testthat/test-manipulate_spacetime_data.R
+++ b/tests/testthat/test-manipulate_spacetime_data.R
@@ -1,5 +1,4 @@
 test_that("convert_stobj_to_stdt works well", {
-  withr::local_package("sf")
   withr::local_package("terra")
   withr::local_package("data.table")
   withr::local_package("dplyr")
@@ -71,17 +70,21 @@ test_that("convert_stobj_to_stdt works well", {
   # 1) it should work
   stobj <-
     terra::vect(
-                df,
-                geom = c("lon", "lat"),
-                crs = "EPSG:4326",
-                keepgeom = FALSE)
+      df,
+      geom = c("lon", "lat"),
+      crs = "EPSG:4326",
+      keepgeom = FALSE
+    )
   expect_no_error(convert_stobj_to_stdt(stobj))
   stdt <- convert_stobj_to_stdt(stobj)$stdt
   expect_equal(class(stdt)[[1]], "data.table")
   expect_equal(class(convert_stobj_to_stdt(stobj)$crs_stdt), "character")
   expect_true({
-               terra::same.crs(convert_stobj_to_stdt(stobj)$crs_stdt,
-                               "EPSG:4326")})
+    terra::same.crs(
+      convert_stobj_to_stdt(stobj)$crs_stdt,
+      "EPSG:4326"
+    )
+  })
   expect_false(any(!(c("lon", "lat", "time") %in% colnames(stdt))))
   expect_equal(
     stdt[lon == -112 & lat == 35.35 & time == "2023-11-02", var1],
@@ -97,12 +100,13 @@ test_that("convert_stobj_to_stdt works well", {
   # 1) it should work
   var1 <-
     terra::rast(
-                extent = c(-112, -101, 33.5, 40.9),
-                ncol = 5,
-                nrow = 5,
-                crs = "EPSG:4326")
+      extent = c(-112, -101, 33.5, 40.9),
+      ncol = 5,
+      nrow = 5,
+      crs = "EPSG:4326"
+    )
   terra::values(var1) <- seq(-5, 19)
-  terra::add(var1) <- c(var1 ** 2, var1 ** 3)
+  terra::add(var1) <- c(var1**2, var1**3)
   var1 <- rast(
     extent = c(-112, -101, 33.5, 40.9),
     ncol = 5,
@@ -110,7 +114,7 @@ test_that("convert_stobj_to_stdt works well", {
     crs = "EPSG:4326"
   )
   values(var1) <- seq(-5, 19)
-  add(var1) <- c(var1 ** 2, var1 ** 3)
+  add(var1) <- c(var1**2, var1**3)
   names(var1) <- c("2023-11-01", "2023-11-02", "2023-11-03")
   var2 <- rast(
     extent = c(-112, -101, 33.5, 40.9),
@@ -129,20 +133,29 @@ test_that("convert_stobj_to_stdt works well", {
   expect_true(terra::same.crs(stdt_converted$crs_stdt, "EPSG:4326"))
 
   expect_false({
-                any(!(c("lon", "lat", "time") %in%
-                        colnames(stdt_converted$stdt)))})
-  expect_equal({
-                stdt_converted$stdt[
-                                    lon == -106.5 &
-                                      lat == stdt_converted$stdt$lat[37] &
-                                      time == "2023-11-02", var1]},
-  49)
-  expect_equal({
-                stdt_converted$stdt[
-                                    lon == -106.5 &
-                                      lat == stdt_converted$stdt$lat[37] &
-                                      time == "2023-11-02", var2]},
-  9)
+    any(!(c("lon", "lat", "time") %in%
+            colnames(stdt_converted$stdt)))
+  })
+  expect_equal(
+    {
+      stdt_converted$stdt[
+        lon == -106.5 &
+          lat == stdt_converted$stdt$lat[37] &
+          time == "2023-11-02", var1
+      ]
+    },
+    49
+  )
+  expect_equal(
+    {
+      stdt_converted$stdt[
+        lon == -106.5 &
+          lat == stdt_converted$stdt$lat[37] &
+          time == "2023-11-02", var2
+      ]
+    },
+    9
+  )
 
   var1sds <- terra::sds(var1)
   expect_error(convert_stobj_to_stdt(var1sds))
@@ -150,13 +163,11 @@ test_that("convert_stobj_to_stdt works well", {
   # convert stdt to spatrastdataset test
   expect_no_error(sds_from_stdt <- convert_stdt_spatrastdataset(stdt_converted))
   expect_s4_class(sds_from_stdt, "SpatRasterDataset")
-
 })
 
 
 
 test_that("is_stdt works as expected", {
-  withr::local_package("sf")
   withr::local_package("terra")
   withr::local_package("data.table")
   withr::local_package("dplyr")
@@ -185,13 +196,124 @@ test_that("is_stdt works as expected", {
   expect_error(convert_stdt_spatvect(errstdt2))
   expect_error(convert_stdt_sftime(errstdt2))
   expect_error(convert_stdt_spatrastdataset(errstdt2))
+})
+
+test_that("check_mysftime works as expected", {
+  # open testing data
+  stdata <- data.table::fread(paste0(testthat::test_path("..", "testdata/", ""),
+                                     "spacetime_table.csv"))
+  mysft <- sftime::st_as_sftime(stdata,
+    coords = c("lon", "lat"),
+    crs = 4326,
+    time_column_name = "time"
+  )
 
+  # should work
+  expect_no_error(check_mysftime(x = mysft))
 
+  # check that error messages work well
+  expect_error(check_mysftime(stdata), "x is not a sftime")
+  mysft <- sftime::st_as_sftime(as.data.frame(stdata),
+    coords = c("lon", "lat"),
+    crs = 4326,
+    time_column_name = "time"
+  )
+  expect_error(
+    check_mysftime(x = mysft),
+    "x is not inherited from a data.table"
+  )
+  mysft <- stdata |>
+    dplyr::rename("date" = time) |>
+    sftime::st_as_sftime(
+      coords = c("lon", "lat"),
+      crs = 4326,
+      time_column_name = "date"
+    )
+  expect_error(check_mysftime(mysft), "time column should be called time")
+  mysft <- stdata |>
+    sftime::st_as_sftime(
+      coords = c("lon", "lat"),
+      crs = 4326,
+      time_column_name = "time"
+    ) |>
+    dplyr::rename("geom" = "geometry")
+  expect_error(
+    check_mysftime(mysft),
+    "geometry column should be called geometry"
+  )
+  mysft <- sftime::st_as_sftime(stdata,
+    coords = c("lon", "lat"),
+    crs = 4326,
+    time_column_name = "time"
+  )
+  pol <- cbind(
+    c(39.35, 39.36, 39.36, 39.35, 39.35),
+    c(-81.43, -81.43, -81.42, -81.42, -81.43)
+  ) |>
+    list() |>
+    st_polygon()
+  for (i in 1:27) {
+    mysft$geometry[i] <- pol
+  }
+  expect_error(
+    check_mysftime(mysft),
+    "geometry is not a sfc_POINT"
+  )
 })
 
 
+test_that("check_mysf works as expected", {
+  # open testing data
+  stdata <- data.table::fread(paste0(testthat::test_path("..", "testdata/", ""),
+                                     "spacetime_table.csv"))
+  mysf <- sf::st_as_sf(stdata,
+    coords = c("lon", "lat"),
+    crs = 4326
+  )
+
+  # should work
+  expect_no_error(check_mysf(x = mysf))
+
+  # check that error messages work well
+  expect_error(check_mysf(stdata), "x is not a sf")
+  mysf <- sf::st_as_sf(as.data.frame(stdata),
+    coords = c("lon", "lat"),
+    crs = 4326
+  )
+  expect_error(
+    check_mysf(x = mysf),
+    "x is not inherited from a data.table"
+  )
+  mysf <- stdata |>
+    sf::st_as_sf(
+      coords = c("lon", "lat"),
+      crs = 4326
+    ) |>
+    dplyr::rename("geom" = "geometry")
+  expect_error(
+    check_mysf(mysf),
+    "geometry column should be called geometry"
+  )
+  mysf <- sf::st_as_sf(stdata,
+    coords = c("lon", "lat"),
+    crs = 4326
+  )
+  pol <- cbind(
+    c(39.35, 39.36, 39.36, 39.35, 39.35),
+    c(-81.43, -81.43, -81.42, -81.42, -81.43)
+  ) |>
+    list() |>
+    st_polygon()
+  for (i in 1:27) {
+    mysf$geometry[i] <- pol
+  }
+  expect_error(
+    check_mysf(mysf),
+    "geometry is not a sfc_POINT"
+  )
+})
+
 test_that("dt_to_sf works as expected", {
-  withr::local_package("sf")
   withr::local_package("terra")
   withr::local_package("data.table")
   withr::local_package("dplyr")
@@ -223,8 +345,6 @@ test_that("dt_to_sf works as expected", {
 
 
 test_that("dt_to_sftime works as expected", {
-  withr::local_package("sf")
-  withr::local_package("sftime")
   withr::local_package("terra")
   withr::local_package("data.table")
   withr::local_package("dplyr")
@@ -261,8 +381,6 @@ test_that("dt_to_sftime works as expected", {
 
 
 test_that("project_dt works as expected", {
-  withr::local_package("sf")
-  withr::local_package("sftime")
   withr::local_package("terra")
   withr::local_package("data.table")
   withr::local_package("dplyr")