As of my last knowledge update in October 2021, there isn't any widely recognized figure, concept, or topic known as "Jacques Feldbau." It's possible that Jacques Feldbau could refer to a specific individual who may not be well-known in public discourse, or it might relate to developments or events that have emerged after my last update.

Jacques Riguet is not widely recognized in popular culture or major historical contexts, so it's possible that he could be a less well-known individual or a fictional character. It's important to provide more context or specify if you're referring to a particular field, profession, or work associated with that name.

Multimedia cartography is an interdisciplinary field that combines traditional cartography with multimedia technologies to create dynamic, interactive, and engaging map representations. It involves the use of various media forms—such as text, images, audio, video, and animations—to enhance the communication of geographic information and to provide users with a richer, more immersive experience when interacting with spatial data.

The National Elevation Dataset (NED) is a collection of elevation data created and maintained by the U.S. Geological Survey (USGS). It provides a high-resolution, consistent, and seamless representation of the Earth's surface elevation across the United States. The NED is built from various data sources, including satellite imagery, lidar, and traditional topographic maps, and it is available in multiple formats and resolutions to meet different user needs.

"Discoveries" by James Ferguson is not a widely recognized title or work attributed to the American astronomer James Ferguson. It is possible that you may be referring to the broader contributions of James Ferguson, who was a notable 18th-century Scottish astronomer and instrument maker, known for his popular writings on astronomy and science. Ferguson's works often aimed to make complex scientific concepts accessible to the general public.

Regev's theorem is a result from the field of lattice-based cryptography, specifically concerning the hardness of certain mathematical problems in lattice theory. The theorem, established by Oded Regev in 2005, demonstrates that certain problems in lattices, such as the Learning with Errors (LWE) problem, are computationally hard, meaning they cannot be efficiently solved by any known classical algorithms.

Natural Earth is a public domain map dataset that provides high-quality, vector and raster map data for both natural and cultural geographic features. It is designed for use in geographic information systems (GIS), cartography, and various forms of spatial analysis. The data sets include information such as: - Physical features: mountains, rivers, lakes, and terrain. - Cultural features: political boundaries, cities, roads, and populated places.

An opisometer is a measuring instrument used to measure lengths or distances along curved paths. It typically consists of a wheel that rolls along the surface of the curve, and the distance is read off a scale or display. Opisometers are often used in fields such as cartography, engineering, and surveying to measure irregular or curved lines, such as those found on maps or in diagrams. They can be mechanical or digital, with the latter providing more precise readings.

"Places & Spaces: Mapping Science" is a collaborative project that aims to visualize the landscape of scientific research through innovative mapping techniques. This initiative is often associated with the work of researchers like Katy Börner, a prominent figure in the field of information visualization and science mapping. The project includes the creation of visualizations that map various aspects of scientific literature, including citation patterns, research topics, and the evolution of scientific fields over time.

Planetary cartography is the science and art of mapping celestial bodies, such as planets, moons, asteroids, and other objects in our solar system and beyond. It involves creating detailed representations of these bodies' surfaces, topography, geology, and other characteristics. Key aspects of planetary cartography include: 1. **Data Collection**: Data for planetary maps is typically gathered from various sources, including space missions, telescopic observations, and remote sensing technologies.

Planimetrics refers to the representation of two-dimensional spatial data, typically focusing on the horizontal layout of features and landforms on a plane. It involves the use of maps and diagrams to portray the location and arrangement of various physical features, such as buildings, roads, vegetation, and bodies of water, without considering elevation or height.

A Quadrilateralized Spherical Cube (QSC) is a geometric structure used in computer graphics, geospatial analysis, and computational geometry. It represents a method of mapping a spherical surface (like the surface of a sphere) to a cube-like structure while maintaining a quadrilateral (four-sided polygon) representation. The QSC is characterized by the following features: 1. **Cube-like Structure**: The QSC begins with the geometry of a cube.

Robotic mapping refers to the process by which mobile robots create a representation of their environment, typically using spatial data. This representation can take various forms, such as maps that outline physical features, obstacles, or pathways that a robot needs to navigate. The mapping process is an essential component of robotics and is often coupled with navigation and localization tasks.

Rome2Rio is a travel planning platform that helps users find the best routes and transportation options between destinations. Launched in 2010, it aggregates various modes of transportation, including flights, trains, buses, ferries, and driving directions, allowing users to compare different travel options based on time, cost, and convenience. The website and mobile app provide users with detailed information about schedules, ticket prices, and connections, making it a valuable resource for travelers looking to plan their journeys efficiently.

"Romer" can refer to several different things, depending on the context. Here are a few possibilities: 1. **Paul Romer**: An American economist known for his work in endogenous growth theory, which emphasizes the role of technology and innovation in economic growth. He was awarded the Nobel Prize in Economic Sciences in 2018. 2. **Romer’s theorem**: In mathematics, particularly in graph theory, this theorem pertains to the colorability of graphs.

Rubbersheeting is a term used primarily in the context of **cartography** and **geographic information systems (GIS)**. It refers to a process of manipulating a map or image to correct distortions, align it more closely with another map or coordinate system, or adjust the scale of the image. This technique is especially useful when dealing with historical maps, aerial photographs, or satellite imagery that may not be perfectly aligned with contemporary geographic data.

The Spatial Data Transfer Standard (SDTS) is a standard developed by the U.S. federal government for the transfer of spatial data between different computer systems, primarily used in geographic information systems (GIS). It was created to enhance interoperability and facilitate the sharing of geospatial data among various users and applications. Key characteristics of SDTS include: 1. **Interoperability**: SDTS provides a standardized format that enables different systems to understand and process spatial data without the need for special translation mechanisms.

A stereoautograph is a specialized device used primarily in the field of stereo photography and 3D imaging. It typically refers to a machine or system that can create stereo images, which provide a sense of depth by displaying two slightly different perspectives of the same scene, mimicking the way human eyes perceive depth.

Styled Layer Descriptor (SLD) is an XML-based markup language used to define the visual styling of geospatial data in web mapping applications. It is part of the Open Geospatial Consortium (OGC) standards and is primarily used with Web Map Services (WMS) to specify how map layers should be rendered. SLD allows users to create detailed and customized styles for geographic data by defining rules, symbols, colors, and other visual properties.

Heine's identity is a mathematical identity related to sums of binomial coefficients. It is typically stated in the following form: \[ \sum_{k=0}^n \binom{r}{k} \binom{s}{n-k} = \binom{r+s}{n} \] for non-negative integers \( r \), \( s \), and \( n \).