Create crs_utils.py

appStore/crs_utils.py

@@ -0,0 +1,28 @@
+import pandas as pd
+import re
+
+# Load the CRS lookup CSV once at import time
+crs_lookup = pd.read_csv("docStore/crs5_codes.csv")  # columns: "code" and "new_crs_value"
+
+def lookup_crs_value(crs_key):
+    """
+    Lookup the new CRS value given a CRS key, based on the loaded CSV file.
+
+    Args:
+        crs_key (str): The raw CRS code (possibly with trailing .0).
+
+    Returns:
+        str: The mapped CRS value or empty string if not found.
+    """
+    key_clean = re.sub(r'\.0$', '', str(crs_key).strip())
+    row = crs_lookup[crs_lookup["code"].astype(str) == key_clean]
+    if not row.empty:
+        if "new_crs_value" in row.columns:
+            try:
+                return re.sub(r'\.0$', '', str(int(float(row.iloc[0]["new_crs_value"]))))
+            except Exception:
+                return re.sub(r'\.0$', '', str(row.iloc[0]["new_crs_value"]))
+        else:
+            # fallback to "name" column if no "new_crs_value" column
+            return re.sub(r'\.0$', '', str(row.iloc[0]["name"]).strip())
+    return ""