--- a/pkg/imports/sr.go	Tue Dec 04 18:54:50 2018 +0100
+++ b/pkg/imports/sr.go	Tue Dec 04 19:25:35 2018 +0100
@@ -40,14 +40,24 @@
 	"gemma.intevation.de/gemma/pkg/octree"
 )
 
+// SoundingResult is a Job to import sounding reults
+// from a ZIP file into the database.
 type SoundingResult struct {
+	// Dir is the folder in the file system where the
+	// 'sr.zip' is expect to be.
 	Dir string `json:"dir"`
 
 	// Override data
-	Date           *models.SoundingResultDate `json:"date,omitempty"`
-	Bottleneck     *string                    `json:"bottleneck,omitempty"`
-	EPSG           *uint                      `json:"epsg,omitempty"`
-	DepthReference *string                    `json:"depth-reference,omitempty"`
+	// Date if given overrides the date value from the meta.json.
+	Date *models.SoundingResultDate `json:"date,omitempty"`
+	// Date if given overrides the name of the bottleneck from the meta.json.
+	Bottleneck *string `json:"bottleneck,omitempty"`
+	// EPSG if given overrides the EPSG code from the meta.json.
+	// Defaults to WGS84.
+	EPSG *uint `json:"epsg,omitempty"`
+	// DepthReference if given overides the DepthReference value
+	// from the meta.json.
+	DepthReference *string `json:"depth-reference,omitempty"`
 }
 
 const (
@@ -55,6 +65,7 @@
 	contourTolerance = 0.1
 )
 
+// SRJobKind is the unique name of a SoundingResult import job.
 const SRJobKind JobKind = "sr"
 
 type srJobCreator struct{}
@@ -155,10 +166,13 @@
 `
 )
 
+// FromString revives a SoundingResult import from a string.
 func (sr *SoundingResult) FromString(data string) error {
 	return json.NewDecoder(strings.NewReader(data)).Decode(sr)
 }
 
+// ToString serializes a SoundingResult import into a string to
+// be revived by FromString.
 func (sr *SoundingResult) ToString() (string, error) {
 	var b strings.Builder
 	if err := json.NewEncoder(&b).Encode(sr); err != nil {
@@ -167,6 +181,7 @@
 	return b.String(), nil
 }
 
+// Do executes the actual sounding result import.
 func (sr *SoundingResult) Do(
 	ctx context.Context,
 	importID int64,
@@ -313,6 +328,8 @@
 	return &summary, err
 }
 
+// CleanUp removes the folder containing the ZIP file with the
+// the sounding result import.
 func (sr *SoundingResult) CleanUp() error {
 	return os.RemoveAll(sr.Dir)
 }