diff --git a/ocat.c b/ocat.c
index 84e7d92..d3c5fe2 100644
--- a/ocat.c
+++ b/ocat.c
@@ -121,22 +121,23 @@ void usage(char *prog)
 	printf("  --device devicename   -d	specify device name ($OCAT_DEVICE)\n");
 	printf("  --from <time>         -F      from date/time; default -6H\n");
 	printf("  --to   <time>         -T      to date/time; default now\n");
-	printf("         specify <time> as     YYYY-MM-DDTHH:MM:SS\n");
-	printf("                               YYYY-MM-DDTHH:MM\n");
-	printf("                               YYYY-MM-DDTHH\n");
-	printf("                               YYYY-MM-DD\n");
-	printf("                               YYYY-MM\n");
-	printf("  --limit <number>	-N     last <number> points\n");
-	printf("  --format json    	-f     output format (default: JSON)\n");
-	printf("           csv                 (overrides $OCAT_FORMAT\n");
-	printf("           geojson\n");
+	printf("         specify <time> as     	YYYY-MM-DDTHH:MM:SS\n");
+	printf("                               	YYYY-MM-DDTHH:MM\n");
+	printf("                               	YYYY-MM-DDTHH\n");
+	printf("                               	YYYY-MM-DD\n");
+	printf("                               	YYYY-MM\n");
+	printf("  --limit <number>	-N     	last <number> points\n");
+	printf("  --format json    	-f     	output format (default: JSON)\n");
+	printf("           csv                 	(overrides $OCAT_FORMAT\n");
+	printf("           geojson		Geo-JSON points\n");
+	printf("           linestring		Geo-JSON LineString\n");
 	printf("           gpx\n");
 	printf("           raw\n");
-	printf("           payload\n");
-	printf("  --fields tst,lat,lon,...     Choose fields for CSV. (dflt: ALL)\n");
-	printf("  --last		-L     JSON object with last users\n");
-	printf("  --killdata                   requires -u and -d\n");
-	printf("  --storage		-S     storage dir (./store)\n");
+	printf("           payload		Like RAW but JSON payload only\n");
+	printf("  --fields tst,lat,lon,...     	Choose fields for CSV. (dflt: ALL)\n");
+	printf("  --last		-L     	JSON object with last users\n");
+	printf("  --killdata                   	requires -u and -d\n");
+	printf("  --storage		-S     	storage dir (./store)\n");
 	printf("\n");
 	printf("Options override these environment variables:\n");
 	printf("   $OCAT_USERNAME\n");