6.3 Camera tagging methods
There are three primary functions for camera image tagging within WildTrax:
- Check that the location name on WildTrax matches the camera prefix
- Identify all species captured by the camera
- Determine the sampling effort of the camera by applying camera range tags where needed
All tasks with the status “Ready for Tagging” can be tagged. Unless you are the organization or project admin you can only tag the tasks that are assigned to you.
6.3.2 Validating location information
There are two ways you can validate the location of the image set - this is important as you'll want to be sure that this metadata is available and accurate.
This step is only applicable if a reference sign was used during field set-up and/or pick-up activities. If this does not apply, please continue to the Tagging images section. Double-checking the location information is an easy, but important task. It should be completed for all applicable tasks where reference signs are used.
Auto- and context-taggers are optional WildTrax processing tools that speed up tagging and reduce the overall number of images visible in the tagging screen. These tools automatically tag common species, such as cows, false-fire images, and staff setup images at the beginning of an image set. Images tagged by the auto- and context-taggers are automatically hidden from view. If staff setup photos are not visible on the first page of the tagging screen, the filter will need to be adjusted to complete the location information check. If this is the case, then:
- Click on a task to be taken to the tagging page. On the tagging page, click on the button, found to the right of the location name.
- Uncheck the box that says “Exclude Auto-tagged”. This page will show all auto-tagged photos.
Review the initial staff setup photos and check the reference sign against the photo labels (if present) and the location name used in WildTrax. Notify the project admin if there are any mismatches.
6.3.3 Tagging images
From the tagging screen, select one or more images for tagging. This can be done by:
- Clicking on the image to select it.
- Clicking and dragging your cursor over groups of images (initial click must be on an image).
- Using Shift, you can click on the first image; then, holding Shift, click on the last image to select all images in between.
- Using Ctrl, you can select multiple images that are not in a consecutive order. This includes being able to drag boxes around multiple subsets of images.
- Selecting images in the panel on the left-hand side of the screen. Note: Selected images will be highlighted in teal in the number panel. Press ESC at any time to deselect highlighted images.
- Apply tag(s) to selected image(s) using the tagging window. With image(s) selected, click on “Tag Selected X”, where X represents the number of images you have highlighted for tagging, and fill in applicable information.
- The tagging form is slightly different when tagging a single image compared to a batch image tagging form:
Single image tagging form
Batch image tagging form
There are 4 key tagging scenarios you may encounter:
- If you select one or more images with a single individual of a species then a single tag is applied. Once the tag fields are completed, click “Save All and Close” to apply the tag.
- If you select a single image that contains > 1 individual of a single species, but age and/or sex differ among these individuals, then multiple tags are applied. Once you have completed the tag fields for the first individual, click to create a new tag for the next individual.
- Example: An image with a female deer with a fawn, or a male and female deer together. In this case you would create a unique tag for each individual.
- If you select a single image that contains > 1 species then multiple tags are applied. Once you have completed the tag fields for the first species/individual, click to create a new tag for the next species/individual.
- Example: An image where a deer triggered the camera and a coyote was also captured in the background. In this case, you would create a tag for the deer and then create a tag for the coyote.
- If you select multiple images that contain > 1 individual of a single species and age and/or sex differ among these individuals then multiple tags are applied. Once you have completed the tag fields for the first individual, click to create a new tag for the next individual.
6.3.4 Species Identification
This menu is divided into Mammals, Birds, and Human tags. Common species appear at the top of the drop-down menu to help with quick tagging.
Special species tags are also used: UNKNOWN: Is used if the individual in the image cannot be identified based on visible features. This is often used when the only images of an individual are blurs, blotches of fur, etc. NONE: Is used when the camera takes a motion-activated photo, but no individual is present in the photo. STAFF/SETUP: This tag is used for the series of photos taken while staff are setting up or taking down the camera.
This tag is applied when the sex of an individual can be identified. For example, ungulate species such as deer, elk, and moose can be identified to sex based on the presence of antlers, but antlers are not manifested year-round. Therefore, antler-less ungulates are only tagged as female between May 15 and October 1. Outside of these dates, the default of Unknown is used if antlers are not present. This field defaults to UNKN, and users have the option of leaving this field as UNKN or selecting VNA (variable not applicable) if they are not interested in using it. Some species, such as bears, are often photographed with their young. When an adult wild mammal is with young, it can be assumed to be Female and tagged as such.
This tag defaults to Adult for wild mammals. The Age field for domestic animals, birds, and humans defaults to VNA. The juvenile tag is only used for an animal’s first summer where they have clear juvenile features, such as spots. The user can also select VNA if they are not interested in collecting information for this field.
6.3.5 Number of individuals
The number of individuals defaults to 1 for all wild animals. If the count is greater than one, then the number can be changed. Users can also input VNA if they do not want to collect information in this field. For domestic animals, birds, and humans the number of individuals defaults to VNA.
6.3.6 Applying camera field of view tags
These tags are only used when the camera field of view is changed compared to the set-up view (see Camera range criteria). During tagging, the “Out of Range” tag is applied to the first image where the area of view changes significantly for three or more hours. This image may be a motion or time-lapse image. Examples of when to apply an out of range tag include:
- The camera was tilted past the acceptable limits (see camera range criteria)
- The lens was more than 50% covered (by snow, vegetation, fallen trees, etc.)
If the camera returns to the original view, a second “Out of Range” tag can be added to the image immediately before the view was fixed. It is not necessary to tag every image as out of range. WildTrax will complete the process automatically during field of view review. The “Field of View” drop-down menu in the tagging form defaults to “Within” as images are assumed to be within range.
6.3.8 Tagging hints
Images with abundant species that will all have the same tag, such as domestic cows, may be left untagged until the end. Once all other images in the image set (including NONE) have been tagged, you can select the button, and enter the Domestic Cow tag in the tagging window. This will tag all remaining untagged images within that image set on all pages as Domestic Cow. Domestic Cow defaults to VNA for Sex and Age Class, and Number of Individuals; thus this tag can be applied to all images regardless of these variables. This is true for all domestic animals. This can also be done if many images have nothing in them and would be tagged as NONE. However, cannot be used for wild species where the age/sex variable, or number of individuals may vary.