From 167ec690a0386cd23ba84d8c4e625d8508fe966b Mon Sep 17 00:00:00 2001
From: Eric Fischer <enf@pobox.com>
Date: Fri, 17 Apr 2015 10:48:03 -0700
Subject: [PATCH] Warn if no Features have been seen after 50 JSON hashes are
 closed.

---
 geojson.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/geojson.c b/geojson.c
index 304f0cbd..58d6f843 100644
--- a/geojson.c
+++ b/geojson.c
@@ -425,6 +425,8 @@ int read_json(int argc, char **argv, char *fname, const char *layername, int max
 		json_pull *jp;
 		const char *reading;
 		FILE *fp;
+		long long found_hashes = 0;
+		long long found_features = 0;
 
 		if (n >= argc) {
 			reading = "standard input";
@@ -451,11 +453,22 @@ int read_json(int argc, char **argv, char *fname, const char *layername, int max
 				break;
 			}
 
+			if (j->type == JSON_HASH) {
+				found_hashes++;
+
+				if (found_hashes == 50 && found_features == 0) {
+					fprintf(stderr, "%s:%d: Not finding any GeoJSON features in input. Is your file just bare geometries?\n", reading, jp->line);
+					break;
+				}
+			}
+
 			json_object *type = json_hash_get(j, "type");
 			if (type == NULL || type->type != JSON_STRING || strcmp(type->string, "Feature") != 0) {
 				continue;
 			}
 
+			found_features++;
+
 			json_object *geometry = json_hash_get(j, "geometry");
 			if (geometry == NULL) {
 				fprintf(stderr, "%s:%d: feature with no geometry\n", reading, jp->line);