README.md

metadata

language:
  - el
  - en
  - bg
license: cc-by-4.0
pretty_name: Multilingual Hierarchical Points of Interest (POI) with Portal Descriptions
task_categories:
  - text-classification
  - tabular-classification
  - translation
tags:
  - geospatial
  - multilingual
  - poi
  - travel
  - regional-hierarchy
  - greece
  - bulgaria
  - text-mining
dataset_info:
  config_name: default
  features:
    - name: id
      dtype: int64
    - name: gr_name
      dtype: string
    - name: en_name
      dtype: string
    - name: bg_name
      dtype: string
    - name: poi_description_el
      dtype: string
    - name: poi_description_en
      dtype: string
    - name: poi_description_bg
      dtype: string
    - name: category_id
      dtype: int64
    - name: gr_categoryname
      dtype: string
    - name: en_categoryname
      dtype: string
    - name: bg_categoryname
      dtype: string
    - name: area_id
      dtype: int64
    - name: gr_areaname
      dtype: string
    - name: en_areaname
      dtype: string
    - name: bg_areaname
      dtype: string
    - name: calculated_root_area_id
      dtype: int64
    - name: gr_root_areaname
      dtype: string
    - name: en_root_areaname
      dtype: string
    - name: bg_root_areaname
      dtype: string
    - name: root_area_id
      dtype: int64
    - name: review_status
      dtype: int64
    - name: deleted
      dtype: bool
    - name: modified
      dtype: string
    - name: main_image
      dtype: string
    - name: coord_x
      dtype: string
    - name: coord_y
      dtype: string

Multilingual Hierarchical Points of Interest (POI) with Portal Descriptions

Dataset Summary

This dataset contains fully localized Points of Interest (POIs) enriched with parallel multi-lingual text descriptions, structural operational categories, and deep geographic hierarchical assignments. It provides complete string translations across Greek (EL), English (EN), and Bulgarian (BG).

Beyond core structural indexing, this dataset includes long-form portal descriptions (portal_description) for each language. Additionally, each POI maps dynamically back to its ultimate high-level geographic root node via pre-calculated tree-path extractions. This makes it an ideal reference set for cross-lingual semantic search, localized embedding training, natural language processing (NLP) tasks in regional languages, and complex hierarchical classification.

Supported Tasks

• Cross-Lingual Information Retrieval & NLP: Training dense embedding models or semantic search indexers to align multi-lingual text metadata across Greek, Latin, and Cyrillic scripts.
• Machine Translation / Parallel Text Alignment: Leveraging the corresponding long-form poi_description_* fields for domain-specific low-resource language matching or tuning.
• Hierarchical Multiclass Classification: Training classifiers to resolve categorical or spatial distributions based on structural text narratives.

Languages

The schema exposes full localized properties across three target sets:

• Greek (lang_id=1, _el or gr_ prefix)
• English (lang_id=2, _en or en_ prefix)
• Bulgarian (lang_id=4, _bg or bg_ prefix)

---

Dataset Structure

Data Instance Example

This is an exhaustive representation of a single row returned by the dataset query, including all calculated properties, localized joins, and base fields unpacked from pois.*:

{
  "id": 1024,
  "gr_name": "Ακρόπολη Αθηνών",
  "en_name": "Acropolis of Athens",
  "bg_name": "Акропол",
  "poi_description_el": "Ο ιερός βράχος της Ακρόπολης φιλοξενεί τα σπουδαιότερα μνημεία της κλασικής αρχαιότητας, συμπεριλαμβανομένου του Παρθενώνα...",
  "poi_description_en": "The ancient citadel located on a rocky outcrop above the city of Athens, containing the remains of several ancient buildings of great architectural significance...",
  "poi_description_bg": "Древният акропол, разположен на скалист хълм над град Атина, съдържащ останките на няколко антични сгради с голямо архитектурно значение...",
  "category_id": 45,
  "gr_categoryname": "Αρχαιολογικοί Χώροι",
  "en_categoryname": "Archaeological Sites",
  "bg_categoryname": "Археологически обекти",
  "area_id": 12,
  "gr_areaname": "Πλάκα",
  "en_areaname": "Plaka",
  "bg_areaname": "Плака",
  "calculated_root_area_id": 1,
  "gr_root_areaname": "Αττική",
  "en_root_areaname": "Attica",
  "bg_root_areaname": "Атика",
  "root_area_id": 1,
  "review_status": 4,
  "deleted": false,
  "modified": "2026-07-17T12:00:00Z",
  "main_image": "uploads/images/pois/acropolis.jpg",
  "coord_x": "23.7257",
  "coord_y": "37.9715"
}