diff --git a/img/contour_down.png b/img/contour_down.png
new file mode 100644
index 0000000..0b4b70d
Binary files /dev/null and b/img/contour_down.png differ
diff --git a/img/contour_up.png b/img/contour_up.png
new file mode 100644
index 0000000..3c15460
Binary files /dev/null and b/img/contour_up.png differ
diff --git a/img/gis_analytical.png b/img/gis_analytical.png
new file mode 100644
index 0000000..2686fc4
Binary files /dev/null and b/img/gis_analytical.png differ
diff --git a/img/map_compass.png b/img/map_compass.png
new file mode 100644
index 0000000..5eddda4
Binary files /dev/null and b/img/map_compass.png differ
diff --git a/img/remote_sensing.png b/img/remote_sensing.png
new file mode 100644
index 0000000..359855d
Binary files /dev/null and b/img/remote_sensing.png differ
diff --git a/img/shibuya_jjk.jpg b/img/shibuya_jjk.jpg
new file mode 100644
index 0000000..e5a3831
Binary files /dev/null and b/img/shibuya_jjk.jpg differ
diff --git a/img/tokyo_toner_map.jpg b/img/tokyo_toner_map.jpg
new file mode 100644
index 0000000..071d71d
Binary files /dev/null and b/img/tokyo_toner_map.jpg differ