The present availability of sub-decametre digital elevation models on Mars – crucial for the study of surface processes – is scarce. In contrast to low-resolution global datasets, such models enable the study of landforms <10 km in size, which is the primary scale at which geomorphic processes have been active on Mars over the last 10–20 Myr . Stereogrammetry is a means of producing digital elevation models from stereo pairs of images. The HiRISE camera on board the Mars Reconnaissance Orbiter has captured >3000 stereo pairs at 0.25 m pixel⁻¹ resolution, enabling the creation of high-resolution digital elevation models (1–2 m pixel⁻¹). Hitherto, only ∼500 of these pairs have been processed and made publicly available. Existing pipelines for the production of digital elevation models from stereo pairs, however, are built upon commercial software, rely upon sparsely available intermediate data, or are reliant on proprietary algorithms. In this paper, we present and test the output of a new pipeline for producing digital elevation models from HiRISE stereo pairs that is built entirely upon the open-source NASA Ames Stereo Pipeline photogrammetric software, making use of freely available data for cartographic rectification. This pipeline is designed for simple application by researchers interested in the use of high-resolution digital elevation models. Implemented here on a research computing cluster, this pipeline can also be used on consumer-grade UNIX computers. We produce and evaluate four digital elevation models using the pipeline presented here. Each are globally well registered, with accuracy similar to those of digital elevation models produced elsewhere.

中文翻译：

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使用开源Ames立体声管道为火星创建HiRISE数字高程模型

对于火星表面上研究而言，至关重要的是，目前不足的亚分米数字高程模型的可用性。与低分辨率的全球数据集相比，此类模型可以研究小于10  km的地形，这是过去10-20 Myr期间火星上地貌过程活跃的主要尺度。立体图测量是从立体图像对生成数字高程模型的一种方法。火星侦察轨道飞行器上的HiRISE摄像机以0.25 m像素^-1的分辨率捕获了3000多个立体声对，从而可以创建高分辨率数字高程模型（1-2 m像素^-1）。迄今为止，仅约500这些对中的任何一个都已处理并公开提供。但是，用于从立体声对生成数字高程模型的现有管道是建立在商业软件上，依赖于稀疏可用的中间数据或依赖于专有算法。在本文中，我们介绍并测试了一条新管道的输出，该管道用于从HiRISE立体声对生成数字高程模型，该管道完全建立在开源NASA Ames立体管道摄影测量软件的基础上，利用免费可用的数据进行制图校正。该管道是为对使用高分辨率数字高程模型感兴趣的研究人员的简单应用而设计的。这里在研究计算集群上实现，该管道也可以在消费级UNIX计算机上使用。我们使用此处介绍的管道生成和评估四个数字高程模型。每个都在全球范围内进行了很好的注册，其准确性与其他地方制作的数字高程模型相似。