Client code for robot position webpage.

Change-Id: I935dfe7242cd4a8c5b9b3bc8d6e137d29786e0f1
diff --git a/y2019/vision/server/www/constants.ts b/y2019/vision/server/www/constants.ts
new file mode 100644
index 0000000..6180df1
--- /dev/null
+++ b/y2019/vision/server/www/constants.ts
@@ -0,0 +1,5 @@
+// Conversion constants to meters
+export const IN_TO_M = 0.0254;
+export const FT_TO_M = 0.3048;
+// Width of the field in meters
+export const FIELD_WIDTH = 27 * FT_TO_M;