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diff --git a/cachememory/Cargo.toml b/cachememory/Cargo.toml
index f7ed6c6..44c1489 100644
--- a/cachememory/Cargo.toml
+++ b/cachememory/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "cachememory"
 version = "0.1.0"
-edition = "2018"
+edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/cachememory/Makefile b/cachememory/Makefile
new file mode 100644
index 0000000..1bd40ea
--- /dev/null
+++ b/cachememory/Makefile
@@ -0,0 +1,9 @@
+
+dev:
+	cargo watch -x build
+
+test:
+	cargo watch -x test
+
+test-once:
+	cargo test
diff --git a/geo-types/Cargo.lock b/geo-types/Cargo.lock
new file mode 100644
index 0000000..0ca2a91
--- /dev/null
+++ b/geo-types/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "geo-tipoj"
+version = "0.1.0"
diff --git a/geo-types/Cargo.toml b/geo-types/Cargo.toml
new file mode 100644
index 0000000..84bd9b1
--- /dev/null
+++ b/geo-types/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "geo-types"
+version = "0.1.0"
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/geo-types/Makefile b/geo-types/Makefile
new file mode 100644
index 0000000..1bd40ea
--- /dev/null
+++ b/geo-types/Makefile
@@ -0,0 +1,9 @@
+
+dev:
+	cargo watch -x build
+
+test:
+	cargo watch -x test
+
+test-once:
+	cargo test
diff --git a/geo-types/src/lib.rs b/geo-types/src/lib.rs
new file mode 100644
index 0000000..94b816b
--- /dev/null
+++ b/geo-types/src/lib.rs
@@ -0,0 +1,43 @@
+use std::fmt;
+
+#[derive(Clone, Debug, PartialEq)]
+pub struct Latitude(f32);
+
+impl From<f32> for Latitude {
+    fn from(val: f32) -> Self {
+        if val > 90.0 || val < -90.0 {
+            panic!("Latitudo is outside of range");
+        }
+        Self(val)
+    }
+}
+
+impl fmt::Display for Latitude {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", self.0)
+    }
+}
+
+#[derive(Clone, Debug, PartialEq)]
+pub struct Longitude(f32);
+
+impl From<f32> for Longitude {
+    fn from(val: f32) -> Self {
+        if val > 180.0 || val < -180.0 {
+            panic!("Longitude is outside of range");
+        }
+        Self(val)
+    }
+}
+
+impl fmt::Display for Longitude {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", self.0)
+    }
+}
+
+pub struct GridPoint {
+    pub station: String,
+    pub x: u32,
+    pub y: u32,
+}