Abstract: Provided are methods, systems, devices, apparatuses, and tangible non-transitory computer readable media for navigation and geocoding. The disclosed technology can perform operations including accessing semantic tags associated with images. Each of the semantic tags can be associated with features depicted by one of the images. Further, each of the features can be associated with a geographic location. Based on the semantic tags, landmarks that include the features that satisfy entropic criteria can be identified. The entropic criteria can measure a localized prominence of each of the one or more features. A landmark for use in navigation at the location can be selected based on context data associated with a location on a path that includes a plurality of locations. Furthermore, at least one navigational instruction that references the landmark can be generated.

Abstract: Provided are methods, systems, devices, apparatuses, and tangible non-transitory computer readable media for navigation and geocoding. The disclosed technology can perform operations including accessing semantic tags associated with images. Each of the semantic tags can be associated with features depicted by one of the images. Further, each of the features can be associated with a geographic location. Based on the semantic tags, landmarks that include the features that satisfy entropic criteria can be identified. The entropic criteria can measure a localized prominence of each of the one or more features. A landmark for use in navigation at the location can be selected based on context data associated with a location on a path that includes a plurality of locations. Furthermore, at least one navigational instruction that references the landmark can be generated.

Abstract: The various technologies presented herein relate to detecting small moving entities or targets in radar imagery. Two SAR images can be captured for a common scene, wherein the scene is imaged twice from the same flight path. The first image is captured at a first instance and the second image is captured at a second instance, and differences between the two images are determined using a complex SAR change measure, excess coherency factor or DeltaC, based in part upon quantification of incoherent (or magnitude) change between the two images. A plurality of operations are performed to enable extraction of coherent change measures relating to the small moving entities from measures relating to large objects, stationary reflective structures, radar focusing artifacts, etc.