GeoLLM: Extracting Geospatial Knowledge from Large Language Models
作者: Rohin Manvi, Samar Khanna, Gengchen Mai, Marshall Burke, David Lobell, Stefano Ermon
分类: cs.CL, cs.LG
发布日期: 2023-10-10 (更新: 2024-02-24)
备注: Accepted to ICLR 2024
🔗 代码/项目: PROJECT_PAGE
💡 一句话要点
提出GeoLLM以提升地理空间预测任务的性能
🎯 匹配领域: 支柱九:具身大模型 (Embodied Foundation Models)
关键词: 地理空间预测 大型语言模型 OpenStreetMap 机器学习 数据增强 模型集成 性能提升
📋 核心要点
- 现有方法通常依赖昂贵的卫星图像或缺乏预测能力的协变量,限制了地理空间预测的准确性。
- GeoLLM通过结合大型语言模型和OpenStreetMap数据,有效提取地理空间知识,提升预测能力。
- 实验表明,GeoLLM在多个任务中相较于基线提升了70%的性能,并超越了现有卫星基准。
📝 摘要(中文)
机器学习在地理空间任务中的应用日益普遍,但通常依赖于昂贵或缺乏预测能力的全球可用协变量。本文探讨了如何利用大型语言模型(LLMs)中蕴含的丰富空间信息来进行地理空间预测。我们提出了GeoLLM,一种结合OpenStreetMap辅助地图数据的创新方法,显著提升了人口密度和经济生计等关键指标的预测性能。实验结果显示,该方法在多个任务中相较于基线提升了70%的性能,并在全球范围内表现出色,展示了LLMs在地理空间信息提取中的潜力。
🔬 方法详解
问题定义:本文旨在解决现有地理空间预测方法对昂贵或低效协变量的依赖问题,探讨如何从大型语言模型中提取有效的地理空间信息。
核心思路:GeoLLM通过结合LLMs的语言知识与OpenStreetMap的辅助地图数据,旨在提高地理空间预测的准确性和效率。这样的设计使得模型能够利用丰富的文本信息来补充传统数据的不足。
技术框架:GeoLLM的整体架构包括数据预处理、模型训练和预测三个主要阶段。首先,利用OpenStreetMap数据进行地理信息的增强,然后通过LLMs进行知识提取,最后进行预测任务的实现。
关键创新:GeoLLM的核心创新在于有效整合LLMs与地理空间数据,克服了传统方法的局限性,尤其是在样本效率和信息丰富性方面。
关键设计:在模型设计中,GeoLLM采用了特定的损失函数以优化预测精度,并通过调节模型参数来提升其对地理空间信息的敏感性。
🖼️ 关键图片
📊 实验亮点
GeoLLM在多个地理空间预测任务中表现出色,相较于基线方法提升了70%的性能,并在与卫星数据基准的比较中表现相当或更优。此外,GPT-3.5在GeoLLM框架下的表现超越了Llama 2和RoBERTa,分别提升了19%和51%。
🎯 应用场景
GeoLLM的研究成果在多个领域具有广泛的应用潜力,包括城市规划、环境监测和经济发展分析等。通过提升地理空间预测的准确性,该方法能够为政策制定者和研究人员提供更为可靠的数据支持,推动可持续发展目标的实现。
📄 摘要(原文)
The application of machine learning (ML) in a range of geospatial tasks is increasingly common but often relies on globally available covariates such as satellite imagery that can either be expensive or lack predictive power. Here we explore the question of whether the vast amounts of knowledge found in Internet language corpora, now compressed within large language models (LLMs), can be leveraged for geospatial prediction tasks. We first demonstrate that LLMs embed remarkable spatial information about locations, but naively querying LLMs using geographic coordinates alone is ineffective in predicting key indicators like population density. We then present GeoLLM, a novel method that can effectively extract geospatial knowledge from LLMs with auxiliary map data from OpenStreetMap. We demonstrate the utility of our approach across multiple tasks of central interest to the international community, including the measurement of population density and economic livelihoods. Across these tasks, our method demonstrates a 70% improvement in performance (measured using Pearson's $r^2$) relative to baselines that use nearest neighbors or use information directly from the prompt, and performance equal to or exceeding satellite-based benchmarks in the literature. With GeoLLM, we observe that GPT-3.5 outperforms Llama 2 and RoBERTa by 19% and 51% respectively, suggesting that the performance of our method scales well with the size of the model and its pretraining dataset. Our experiments reveal that LLMs are remarkably sample-efficient, rich in geospatial information, and robust across the globe. Crucially, GeoLLM shows promise in mitigating the limitations of existing geospatial covariates and complementing them well. Code is available on the project website: https://rohinmanvi.github.io/GeoLLM