Sure! Here are a few online platforms and blogs that provide in-depth analysis and explanations of geography optional concepts:

1. **EduRev Geography Optional**:
- EduRev is a comprehensive online platform that offers a wide range of study materials for various subjects, including geography optional for UPSC.
- They have a dedicated section for geography optional, where you can find detailed notes, practice questions, previous year's papers, and mock tests.
- The platform also provides video lectures by experienced faculty members to help you understand complex concepts in a simplified manner.

2. **ClearIAS**:
- ClearIAS is a popular website that offers study materials and guidance for UPSC exam preparation, including geography optional.
- They provide in-depth analysis of geography optional topics through articles, notes, and mind maps.
- The website also offers free mock tests and study plans specifically designed for geography optional aspirants.

3. **IASbaba**:
- IASbaba is another renowned platform that provides comprehensive study materials for UPSC preparation, including geography optional.
- They offer detailed articles, notes, and current affairs analysis related to geography optional topics.
- The platform also conducts regular webinars and workshops to clarify doubts and provide guidance to aspirants.

4. **InsightsonIndia**:
- InsightsonIndia is a trusted website that provides valuable resources for UPSC exam preparation, including geography optional.
- They offer in-depth analysis of geography optional concepts through articles, notes, and answer writing practice.
- The website also provides daily current affairs updates, which are crucial for geography optional preparation.

5. **ForumIAS**:
- ForumIAS is a popular online platform that offers a community-driven approach to UPSC exam preparation, including geography optional.
- They have a dedicated section for geography optional, where you can find study materials, answer writing practice, and guidance from experienced aspirants and mentors.
- The platform also features a discussion forum where you can interact with fellow aspirants and clarify your doubts.

These platforms and blogs provide valuable resources and guidance for geography optional aspirants. It is advisable to explore multiple sources and choose the ones that resonate with your learning style and requirements. Remember to supplement your online study with standard textbooks and regular practice to excel in your geography optional preparation.