Assume `node_id_param.json` in current directory

Assume that `node_id_param.json` is in the current directory. We do
not want paths written inside the script.

gt_segmented_cf.py

@@ -83,8 +83,7 @@ def calculate_radii_and_rossby(start, end, inc, segment, e_overestim, ext_shp_rc
 # grab e_overestim
 ###############################
 
-node_id_param_file = "/data/misic/Convert_Global/node_id_param.json"
-with open(node_id_param_file) as f: node_id_param = json.load(f)
+with open("node_id_param.json") as f: node_id_param = json.load(f)
 # assign attributes to the whole graphs
 e_overestim = node_id_param["e_overestim"]