--- a/pkg/imports/agm.go	Fri Jan 11 12:01:26 2019 +0100
+++ b/pkg/imports/agm.go	Fri Jan 11 12:10:23 2019 +0100
@@ -22,6 +22,7 @@
 	"log"
 	"os"
 	"path/filepath"
+	"strings"
 
 	"gemma.intevation.de/gemma/pkg/common"
 )
@@ -109,8 +110,34 @@
 		return nil, err
 	}
 
+	headerIndices := map[string]int{}
+
 	for i, f := range headers {
 		log.Printf("%d: %s\n", i, f)
+		headerIndices[strings.ToLower(strings.TrimSpace(f))] = i
+	}
+
+	for _, m := range [...]string{
+		"fk_gauge_id",
+		"measure_date",
+		"from", // "sender",
+		"language_code",
+		"country_code",
+		"date_issue",
+		"reference_code",
+		"water_level",
+		"predicted",
+		"is_waterlevel",
+		"value_min",
+		"value_max",
+		"date_info",
+		"originator", // "source_organization",
+	} {
+		idx, found := headerIndices[m]
+		if !found {
+			log.Printf("missing column '%s'\n", m)
+		}
+		_ = idx
 	}
 
 	return nil, errors.New("Not implemented, yet!")