Displays, instruments, and the multi-dimensional world of cartography

Cartographers are creators and purveyors of maps. Maps are representations of space, geographical images of the environment. Maps organize spatial information for convenience, particularly for use in performing tasks which involve the environment. There are many different kinds of maps, and there are as many different uses of maps as there are spatial problems to be solved. Maps and the display instrument dichotomy are examined. Also examined are the categories of map use along with the characteristics of maps

Ancient Cartographies as a Basis for Geolocation Models in Public Space: The Case of Giambattista Nolli and its Heritage Application

In 1748, the architect and surveyor Giambattista Nolli mapped an abstract reality of the city of Rome. As a challenge to the inherited projections, it represented the city mixing streets, halls, corridors, churches, baths and markets as part of a unique public space network. A new way to design public space and rethink the whole urban system was opened by the possibility of containing in these representations a single layer with all kinds of public space (including the interior of public buildings). Despite this, Nolli's plan remained as a useless instrument since the hegemony of automobile mobility appeared as a pre-eminent system. This research tries to understand how the application of the ancient cartographies' methodology can improve the pedestrian mobility of historic cities by means of enhancing the graphic value of the system of Giambattista Nolli. Nowadays, free public space is represented as empty and built ones, as solid. This proposal would revert this reified conception of the city, understanding this baroque representation as an instrument of identification and assessment of the transitional heritage. The clues unveiled by Nolli seem to be able to integrate the plans of public buildings within the urban tissue, which would result in a step towards the full integration of cartography and mobility. The success of the comprehensive tools offered by large servers such as Alphabet inc. (Google) or Bing Maps confirm the suitability of the combination of new technologies and Big Data with urban planning, reaching the synchronisation of Smart Cities. Nowadays, open public space can be 'walked in' from any electronic device, consequently, the application of the "Nolli methodology" would implement the model of urban geolocation with the assimilation of inner public spaces. In the creation of a great global map of the public space, a chimaera could be intuited. This would be discussed within a tangible reality: every open public space is already housed in the Big Data and it is accessible through geolocation tools. The inclusion of the of the public buildings' interiors would contribute to develop a greater permeability between city and citizens. Furthermore, this representation would optimize pedestrian travel times and would be able to expand the geolocation system network as a documentary repository

What is the relationship between photospheric flow fields and solar flares?

We estimated photospheric velocities by separately applying the Fourier Local Correlation Tracking (FLCT) and Differential Affine Velocity Estimator (DAVE) methods to 2708 co-registered pairs of SOHO/MDI magnetograms, with nominal 96-minute cadence and ~2" pixels, from 46 active regions (ARs) from 1996-1998 over the time interval t45 when each AR was within 45^o of disk center. For each magnetogram pair, we computed the average estimated radial magnetic field, B; and each tracking method produced an independently estimated flow field, u. We then quantitatively characterized these magnetic and flow fields by computing several extensive and intensive properties of each; extensive properties scale with AR size, while intensive properties do not depend directly on AR size. Intensive flow properties included moments of speeds, horizontal divergences, and radial curls; extensive flow properties included sums of these properties over each AR, and a crude proxy for the ideal Poynting flux, the total |u| B^2. Several magnetic quantities were also computed, including: total unsigned flux; a measure of the amount of unsigned flux near strong-field polarity inversion lines, R; and the total B^2. Next, using correlation and discriminant analysis, we investigated the associations between these properties and flares from the GOES flare catalog, when averaged over both t45 and shorter time windows, of 6 and 24 hours. We found R and total |u| B^2 to be most strongly associated with flares; no intensive flow properties were strongly associated with flares.Comment: 57 pages, 13 figures; revised content; added URL to manuscript with higher-quality image

COSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses IX. Time delays, lens dynamics and baryonic fraction in HE 0435-1223

We present accurate time delays for the quadruply imaged quasar HE 0435-1223. The delays were measured from 575 independent photometric points obtained in the R-band between January 2004 and March 2010. With seven years of data, we clearly show that quasar image A is affected by strong microlensing variations and that the time delays are best expressed relative to quasar image B. We measured Delta_t(BC) = 7.8+/-0.8 days, Delta_t(BD) = -6.5+/-0.7 days and Delta_t_CD = -14.3+/-0.8 days. We spacially deconvolved HST NICMOS2 F160W images to derive accurate astrometry of the quasar images and to infer the light profile of the lensing galaxy. We combined these images with a stellar population fitting of a deep VLT spectrum of the lensing galaxy to estimate the baryonic fraction, $f_b$, in the Einstein radius. We measured f_b = 0.65+0.13-0.10 if the lensing galaxy has a Salpeter IMF and f_b = 0.45+0.04-0.07 if it has a Kroupa IMF. The spectrum also allowed us to estimate the velocity dispersion of the lensing galaxy, sigma_ap = 222+/-34 km/s. We used f_b and sigma_ap to constrain an analytical model of the lensing galaxy composed of an Hernquist plus generalized NFW profile. We solve the Jeans equations numerically for the model and explored the parameter space under the additional requirement that the model must predict the correct astrometry for the quasar images. Given the current error bars on f_b and sigma_ap, we did not constrain H0 yet with high accuracy, i.e., we found a broad range of models with chi^2 < 1. However, narrowing this range is possible, provided a better velocity dispersion measurement becomes available. In addition, increasing the depth of the current HST imaging data of HE 0435-1223 will allow us to combine our constraints with lens reconstruction techniques that make use of the full Einstein ring that is visible in this object.Comment: 12 pages, 10 figures, final version accepted for publication by A&

Without Geography, You’re Nowhere: History and Applications of GIS (Library Workshop)

Learning objectives: Know the history and basic terminology of the field of GIS. Be able to interpret and assess the quality of maps produced by a GIS. Understand the process of displaying basic spatial data in a GIS software program. Description: Many of us use GIS, or Geographic Information Systems, in our everyday lives without even knowing it: when was the last time you used Google maps to get to a desired destination? Google is using spatial information about distance, speed limits, and traffic, in order to perform calculations that, ultimately, direct you to your destination along the fastest path. In general, GIS is a framework for gathering, organizing, and analyzing spatial data. By arranging spatial information into coincident layers, GIS software can help reveal deeper insights into patterns and relationships – not only where occurrences and processes of interest are happening, but also why. By visualizing data though maps, GIS users can make smarter decisions. For example, maps and GIS analyses provided vital information for tracking the progressive spread of the COVID-19 pandemic across the Earth. However, maps can also be manipulated through the users’ choice of symbology and classification methods in order to (dis)advantage particular groups of people. In this workshop, participants will learn the history and basic terminology of the GIS field, be able to interpret examples of “good” and “bad” maps produced by GIS, and have an understanding of how to display basic spatial data in a GIS. Skill levels for attendees: Little to no experience Software requirements: Non

Semiotična sporočilnost kartografskih znakov na starih zemljevidih

This study analyzed selected cartographic symbols on old maps depicting the territory of Slovenia from the sixteenth to nineteenth century. A semiotic approach was applied to establish connections between cartographic symbols on old maps and the characteristics of society at the time the maps were created. This semiotic approach was used to discuss the impact of the interpretation of four symbolic cartographic elements, their iconic basis, and the reading of the five maps analyzed. Cartographic symbols changed in line with the development of cartography at the time, as well as society. The depictions of settlements were first stylistic and then geometric. Relief depictions were first stylized and then shown through plastic or spatial methods. Cartographic symbols gradually changed into symbolic signs (in the semiotic sense), including the quality of the map display, as a result of developments and the demands of changing society.Analizirali smo izbrane kartografske znake na starih zemljevidih ozemlja Slovenije od 16. do 19. stoletja. S semiotičnim pristopom smo ugotavljali povezave med kartografskimi znaki na starih zemljevidih in značilnostmi družbe v času nastanka zemljevidov. S semiotičnim pristopom smo obravnavali vpliv interpretacije štirih simbolnih kartografskih elementov, njihove ikonske podlage in družbenega koncepta na branje analiziranih petih zemljevidov. Kartografski znaki so se spreminjali glede na razvoj takratne kartografske stroke in družbe. Upodobitve naselij so bile najprej stilizirane, nato geometrijske. Reliefne upodobitve so bile najprej stilizirane in nato prikazane s plastičnim ali prostorskim načinom prikaza. Kartografski znaki so se postopoma spreminjali v simbolne znake, vključno s kakovostjo prikaza zemljevida, kot posledica razvoja in zahtev spreminjajoče družbe