text: 
  from rest_framework import serializers
  from rest_framework_gis import serializers
  from rest_framework.serializers import CharField
  
  from origin_destination_api.models import OriginDestination, ResidenceAreaCharacteristics, WorkplaceAreaCharacteristics, Xwalk
  
  class OriginDestinationSerializer(serializers.ModelSerializer):
      class Meta:
          model = OriginDestination
          fields = '__all__'
  
  class ResidenceAreaCharacteristicsSerializer(serializers.ModelSerializer):
      class Meta:
          model = ResidenceAreaCharacteristics
          fields = '__all__'
  
  
  class WorkplaceAreaCharacteristicsSerializer(serializers.ModelSerializer):
      class Meta:
          model = WorkplaceAreaCharacteristics
          fields = '__all__'
  #
  class XwalkSerializer(serializers.GeoFeatureModelSerializer):
      class Meta:
          model = Xwalk
          fields = '__all__'
          geo_field = 'geom_intpt_4326'
          id = 'tabblk2010'
  