diff --git a/.Rbuildignore b/.Rbuildignore
index 09a3644..0b362e3 100644
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -3,3 +3,5 @@
 ^.*\.Rproj$
 ^\.Rproj\.user$
 ^overturemapsr\.Rproj$
+^\.github$
+^README\.Rmd$
diff --git a/.github/.gitignore b/.github/.gitignore
new file mode 100644
index 0000000..2d19fc7
--- /dev/null
+++ b/.github/.gitignore
@@ -0,0 +1 @@
+*.html
diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
new file mode 100644
index 0000000..0f2fe08
--- /dev/null
+++ b/.github/workflows/R-CMD-check.yaml
@@ -0,0 +1,52 @@
+# Workflow derived from https://github.com/r-lib/actions/tree/v2/examples
+# Need help debugging build failures? Start at https://github.com/r-lib/actions#where-to-find-help
+on:
+  push:
+    branches: [main, master]
+  pull_request:
+    branches: [main, master]
+
+name: R-CMD-check
+
+permissions: read-all
+
+jobs:
+  R-CMD-check:
+    runs-on: ${{ matrix.config.os }}
+
+    name: ${{ matrix.config.os }} (${{ matrix.config.r }})
+
+    strategy:
+      fail-fast: false
+      matrix:
+        config:
+          - {os: macos-latest,   r: 'release'}
+          - {os: windows-latest, r: 'release'}
+          - {os: ubuntu-latest,   r: 'devel', http-user-agent: 'release'}
+          - {os: ubuntu-latest,   r: 'release'}
+          - {os: ubuntu-latest,   r: 'oldrel-1'}
+
+    env:
+      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
+      R_KEEP_PKG_SOURCE: yes
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: r-lib/actions/setup-pandoc@v2
+
+      - uses: r-lib/actions/setup-r@v2
+        with:
+          r-version: ${{ matrix.config.r }}
+          http-user-agent: ${{ matrix.config.http-user-agent }}
+          use-public-rspm: true
+
+      - uses: r-lib/actions/setup-r-dependencies@v2
+        with:
+          extra-packages: any::rcmdcheck
+          needs: check
+
+      - uses: r-lib/actions/check-r-package@v2
+        with:
+          upload-snapshots: true
+          build_args: 'c("--no-manual","--compact-vignettes=gs+qpdf")'
diff --git a/README.Rmd b/README.Rmd
new file mode 100644
index 0000000..fd276f3
--- /dev/null
+++ b/README.Rmd
@@ -0,0 +1,46 @@
+---
+output: github_document
+---
+
+<!-- README.md is generated from README.Rmd. Please edit that file -->
+
+```{r, include = FALSE}
+knitr::opts_chunk$set(
+  collapse = TRUE,
+  comment = "#>",
+  fig.path = "man/figures/README-",
+  out.width = "100%"
+)
+```
+
+# overturemapsr
+
+<!-- badges: start -->
+[![R-CMD-check](https://github.com/denironyx/overturemapsr/actions/workflows/R-CMD-check.yaml/badge.svg)](https://github.com/denironyx/overturemapsr/actions/workflows/R-CMD-check.yaml)
+<!-- badges: end -->
+
+The goal of overturemapsr is to ...
+
+## Installation
+
+You can install the development version of overturemapsr from [GitHub](https://github.com/) with:
+
+``` r
+# install.packages("devtools")
+devtools::install_github("denironyx/overturemapsr")
+```
+
+## Example
+
+This is a basic example which shows you how to solve a common problem:
+
+```{r example}
+library(overturemapsr)
+## basic example code
+```
+
+
+You'll still need to render `README.Rmd` regularly, to keep `README.md` up-to-date. `devtools::build_readme()` is handy for this.
+
+
+In that case, don't forget to commit and push the resulting figure files, so they display on GitHub and CRAN.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..447eb37
--- /dev/null
+++ b/README.md
@@ -0,0 +1,36 @@
+
+<!-- README.md is generated from README.Rmd. Please edit that file -->
+
+# overturemapsr
+
+<!-- badges: start -->
+
+[![R-CMD-check](https://github.com/denironyx/overturemapsr/actions/workflows/R-CMD-check.yaml/badge.svg)](https://github.com/denironyx/overturemapsr/actions/workflows/R-CMD-check.yaml)
+<!-- badges: end -->
+
+The goal of overturemapsr is to …
+
+## Installation
+
+You can install the development version of overturemapsr from
+[GitHub](https://github.com/) with:
+
+``` r
+# install.packages("devtools")
+devtools::install_github("denironyx/overturemapsr")
+```
+
+## Example
+
+This is a basic example which shows you how to solve a common problem:
+
+``` r
+library(overturemapsr)
+## basic example code
+```
+
+You’ll still need to render `README.Rmd` regularly, to keep `README.md`
+up-to-date. `devtools::build_readme()` is handy for this.
+
+In that case, don’t forget to commit and push the resulting figure
+files, so they display on GitHub and CRAN.
diff --git a/man/figures/README-pressure-1.png b/man/figures/README-pressure-1.png
new file mode 100644
index 0000000..c092055
Binary files /dev/null and b/man/figures/README-pressure-1.png differ