Authorized users can access species habitat models through a geodata portal to conduct analyses. Users must first register for the geodata portal for access and set up their connection to the portal in ArcGIS Pro.


The Species Habitat Model data can have two services: a categorized model data service (NatureServe Categorical Species Habitat Models) and/or a continuous model data service (NatureServe Continuous Species Habitat Models). The services have a REST endpoint available for calling the data and viewing it in desktop or web-based map viewers. If a model has both a categorized and continuous model version available, the versions will share model attributes such as the habitat model ID and the model metadata.


The model data in the Image Services are returned as a mosaic of raster datasets, with an attribute table containing a record of each model's species' scientific name, species' common name, species' element unique ID, a link to the metadata for the model, a low, medium, and high probability threshold, and a label for the model. The models in the mosaic dataset can be filtered or queried to retrieve specific models. If the mosaic dataset is not filtered or queried to retrieve specific models, it will default to displaying the first 20 models uploaded into the service.


Continuous models have a raster with values ranging from 0-1 that reflect the probability that habitat is suitable to support the species. Raster values for categorized models represent 4 categories that represent how the value of each cell in the raster compares to the model's low, medium, and high probability thresholds. See table 1 below for details.

 

Table 1: Threshold Definitions

Pixel Value

 

Meaning

 

Categorization

1

High Probability Habitat

pixel value >= high probability threshold

 

2

Medium Probability Habitat

medium probability threshold <= pixel vale < high probability threshold

 

3

 

Low Probability Habitat

low probability threshold <= pixel value < medium probability threshold

4

Non-Habitat

pixel value < low probability threshold

 

If you add the entire dataset to your map, the data set gets added to your map as a mosaic dataset and has symbology on the item if it is a Categorical model.

  1. The mosaic includes an attribute table with the habitat model id, species information, metadata PDF URL, and other model attributes.
  2. A maximum of 1 model is shown on the map at a time. The model that is shown is haphazardly selected from the available models.
  3. Use a definition query on the mosaic dataset to filter it to a specific model. Use the habitat_model_id from the mosaic attribute table in the definition query to select a particular model.
  1. If you add only a single model to your map it is added as a raster, without any symbology. There is no way to get information stored in the mosaic attribute table if you add the data via this method.
  2. If you view a continuous model, the symbology is assigned by ESRI software and may appear black and white. Updating the symbology will lead to better viewing.

Select Freshwater Models

  1. Both the Feature Service and Map Image Service contain 2 layers: A model catalog layer and a model data layer.
    1. The model catalog layer is similar to the mosaic attribute table. It holds a record of each model available to in the service, and its extent as a polygon, habitat model attributes (including habitat_model_id), species information, and metadata PDF URL.
    2. The model data layer holds the actual data for the Freshwater models. By default, ArcGIS Pro will attempt to draw all features for all models.
      1. To view a specific model, filter the dataset using a definition query to that specific model using the model's habitat_model_id, available in the model catalog layer's attribute table.


Related Solutions: