## Publications

### 2021

• et al., Disentangled dynamic graph deep generation, in Proceedings of the 2021 Siam International Conference on Data Mining (Sdm), 738-746 (Society for Industrial; Applied Mathematics).
• , , & , Mining high resolution earth observation data cubes, in 17th International Symposium on Spatial and Temporal Databases, 152-156 .
• , , & , Movement-aware map construction, International Journal of Geographical Information Science 35, 1065–1093.
• et al., TG-gan: Continuous-time temporal graph deep generative models with time-validity constraints, in Proceedings of the Web Conference 2021, 2104-2116 .

### 2020

• et al., Location-based social network data generation based on patterns of life, in Proceedings of the 21st Ieee International Conference on Mobile Data Management (Mdm), to appear .
• et al., Location-based social simulation for prescriptive analytics of disease spread, SIGSPATIAL Special 12, 53–61.
• et al., Managing uncertainty in evolving geo-spatial data, in 2020 21st Ieee International Conference on Mobile Data Management (Mdm), 5-8 (IEEE).
• , , & , Station-to-user transfer learning: Towards explainable user clustering through latent trip signatures using tidal-regularized non-negative matrix factorization, in Proceedings of the 28th International Conference on Advances in Geographic Information Systems, 303-313 .
• et al., Taking the pulse of covid-19: A spatiotemporal perspective, International Journal of Digital Earth 13, 1186–1211.
• , , & , Traffic flow estimation using probe vehicle data, in 2020 Ieee 7th International Conference on Data Science and Advanced Analytics (Dsaa), 579-588 (IEEE).
• , , & , Vehicle relocation for ride-hailing, in 2020 Ieee 7th International Conference on Data Science and Advanced Analytics (Dsaa), 589-598 (IEEE).

### 2019

• et al., A vocabulary recommendation method for spatiotemporal data discovery based on bayesian network and ontologies, Big Earth Data 3, 220–231.
• et al., CrowdZIP: A system to improve reverse zip code geocoding using spatial and crowdsourced data (demo paper), in Proceedings of the 27th Acm Sigspatial International Conference on Advances in Geographic Information Systems, 588-591 .
• , , & , Distance-aware competitive spatiotemporal searching using spatiotemporal resource matrix factorization (gis cup), in Proceedings of the 27th Acm Sigspatial International Conference on Advances in Geographic Information Systems, 624-627 .
• & , Investigation design: The structural elements of knowledge-seeking efforts, Data & Knowledge Engineering 119, 71–88.
• et al., Location-based social simulation, in Proceedings of the 16th International Symposium on Spatial and Temporal Databases, 218-221 .
• et al., Shortest-path diversification through network penalization: A washington dc area case study, in Proceedings of the 12th Acm Sigspatial International Workshop on Computational Transportation Science, 1-10 .
• et al., Simulating urban patterns of life: A geo-social data generation framework, in Proceedings of the 27th Acm Sigspatial International Conference on Advances in Geographic Information Systems, 576-579 .
• et al., Spatiotemporal bus route profiling using odometer data, in Proceedings of the 27th Acm Sigspatial International Conference on Advances in Geographic Information Systems, 369-378 .
• & , Using openstreetmap point-of-interest data to model urban change—a feasibility study, PloS One 14.

### 2018

• et al., Cancer and social media: A comparison of traffic about breast cancer, prostate cancer, and other reproductive cancers on twitter and instagram, Journal of Health Communication 23, 181–189.
• et al., Quality assessment and accessibility mapping in an image-based geocrowdsourcing testbed, Cartographica: The International Journal for Geographic Information and Geovisualization 53, 1–14.
• et al., Spatio-textual user matching and clustering based on set similarity joins, The VLDB Journal 27, 297–320.
• et al., Spatiotemporal traffic volume estimation model based on gps samples, in Proceedings of the Fifth International Acm Sigmod Workshop on Managing and Mining Enriched Geo-Spatial Data, 1-6 .
• et al., Towards a better understanding of public transportation traffic: A case study of the washington, dc metro, Urban Science 2, 65.

### 2017

• , , & , A layered approach for more robust generation of road network maps from vehicle tracking data, ACM Transactions on Spatial Algorithms and Systems (TSAS) 3, 3.
• et al., A unified framework to predict movement, in International Symposium on Spatial and Temporal Databases, 393-397 (Springer, Cham).
• et al., Crowdsourcing turning-restrictions from map-matched trajectories, Information Systems 64, 221–236.
• et al., Handling uncertainty in geo-spatial data, in Data Engineering (Icde), 2017 Ieee 33rd International Conference On, 1467-1470 (IEEE).
• , , & , Hub labels on the database for large-scale graphs with the cold framework, GeoInformatica, 1–30.
• et al., Knowledge extraction from crowdsourced data for the enrichment of road networks, Geoinformatica 21, 763–795.
• et al., Predicting the evolution of narratives in social media, in International Symposium on Spatial and Temporal Databases, 388-392 (Springer, Cham).
• et al., Social media engagement with cancer awareness campaigns declined during the 2016 us presidential election, World Medical & Health Policy 9, 456–465.
• et al., Zika in twitter: Temporal variations of locations, actors, and concepts, JMIR Public Health and Surveillance 3.

### 2016

• , Crowdsourcing geographic information., in Encyclopedia of Database Systems, to appear (Springer-Verlag).
• & , Crowdsourcing turning-restrictions from map-matched trajectories, Information Systems, in press.
• , , & , Efficient processing of relevant nearest-neighbor queries, ACM Trans. Spatial Algorithms Syst. 2, 9:1–9:28.
• et al., Geo-fingerprinting social media content, in Proceedings of the Third International Acm Sigmod Workshop on Managing and Mining Enriched Geo-Spatial Data, 5:1-5:6 .
• et al., Location estimation using crowdsourced spatial relations, ACM Trans. Spatial Algorithms Syst. 2, 5:1–5:23.
• & , ReHub: Extending hub labels for reverse k-nearest neighbor queries on large-scale networks, Journal of Experimental Algorithmics (JEA) 21, 1–13.
• et al., Similarity search on spatio-textual point sets, in Proc. 19th Int’l Conf. on Extending Database Technology (Edbt), 329-340 .

### 2015

• et al., A comparison and evaluation of map construction algorithms using vehicle tracking data, GeoInformatica Journal 19, 601–632.
• , , & , COLD. Revisiting hub labels on the database for large-scale graphs, in Proc. 14th Int’l Symp. on Spatial and Temporal Databases (Sstd), 22-39 .
• et al., Crowdsourcing urban form and function, International Journal of Geographical Information Science 29, 720–741.
• et al., Knowledge-enriched route computation, in Proc. 14th Int’l Symp. on Spatial and Temporal Databases (Sstd), 157-176 .
• et al., Map Construction Algorithms (Springer-Verlag).
• & , ReHub. Extending hub labels for reverse k-nearest neighbor queries on large-scale networks, Journal of Experimental Algorithms 19, in press.
• , , & , SALT. A unified framework for all shortest-path query variants on road networks, in Proc. 14th Int’l Symp. on Experimental Algorithms (Sea), 298-311 .
• et al., Spatiotemporal behavior profiling: A treasure hunt case study, in Proc. 14th Symp. on Web and Wireless Geographical Information Systems (W2gis), 143-158 .
• et al., Tourismo: A user-preference tourist trip search engine, in Proc. 14th Int’l Symp. on Spatial and Temporal Databases (Sstd), 514-519 .

### 2014

• , , & , Crowdsourcing turning restrictions for openstreetmap, in Proc. Mining Urban Data Edbt/Icdt Workshop, 355-362 .
• et al., Extraction, integration and analysis of crowdsourced points of interest from multiple web sources, in Proc. 3rd Acm Sigspatial International Workshop on Crowdsourced and Volunteered Geographic Information (Geocrowd), 16-23 .
• et al., Extraction, integration and exploration of crowdsourced geospatial content from multiple web sources (demo), in Proc. 22nd Acm Sigspatial Int’l Conference on Advances in Geographic Information Systems (Acm Sigspatial 2014), 553-556 .
• & , GEOCROWD 2013 workshop report: The second int’l workshop on crowdsourced and volunteered geographic information 2013: (Orlando, fl - nov. 5, 2013), SIGSPATIAL Special 6, 11.
• , , & , Geosemantic network-of-interest construction using social media data, in Proc. GISCIENCE Conf., 109-125 .
• & , GRASP. Extending graph separators for the single-source shortest-path problem, in Proc. 22th Annual European Symposium on Algorithms (Esa), 358-370 .
• , Proceedings of the 13th International Symposium on Web and Wireless Geographical Information Systems (Springer Verlag).
• et al., Towards knowledge-enriched path computation, in Proc. 22nd Acm Sigspatial Int’l Conference on Advances in Geographic Information Systems (Acm Sigspatial 2014), 485-488 .

### 2013

• & , Guest editorial: Spatial and temporal databases, GeoInformatica 17, 413–415.
• et al., Isochrones, traffic and demographics, in Proc. 21th Acm Sigspatial Gis Conference, 558-561 .
• & , On quantifying qualitative geospatial data: A probabilistic approach, in Proc. 2nd Acm Sigspatial Int’l Workshop on Crowdsourced and Volunteered Geographic Information (Geocrowd), 71-78 .
• & , Optimizing landmark-based routing and preprocessing, in Proc. 6th Acm Sigspatial Int’l Workshop on Computational Transportation Science (Iwcts), 25-30 .
• , , & , Segmentation-based road network construction, in Proc. 21th Acm Sigspatial Gis Conference, 470-473 .
• et al., Towards a flexible and scalable fleet management service, in Proc. 6th Acm Sigspatial Int’l Workshop on Computational Transportation Science (Iwcts), 79-84 .
• & , User-contributed relevance and nearest neighbor queries, in Proc. 13th Int’l Symposium on Advances in Spatial and Temporal Databases (Sstd), 312-329 (Springer-Verlag).

### 2012

• & , Collaborative geospatial feature search, in Proc. 20th Acm Sigspatial Gis Conference, to appear .
• , , & , Crowdsourcing computing resources for shortest-path computation, in Proc. 20th Acm Sigspatial Gis Conference, to appear .
• & , On vehicle tracking data-based road network generation, in Proc. 20th Acm Sigspatial Gis Conference, to appear .
• , , & , Proceedings of the First Acm Sigspatial International Workshop on Crowdsourced and Volunteered Geographic Information (Geocrowd) (ACM).

### 2011

• , 12th International Symposium on Advances in Spatial and Temporal Databases (Springer-Verlag).
ABSTRACT
• , , & , Efficient data management in support of shortest-path computation, in Proc. 4th Acm Sigspatial International Workshop on Computational Transportation Science (Cts), 28-33 .
• & , Jeocrowd: Collaborative searching of user-generated point datasets, in Proc. ACM Sigspatial Symposium (Acmgis), 509-512 .
• et al., Mobile task computing: Beyond location-based services and ebooks, in W2GIS’11: Proceedings of the 10th International Conference on Web and Wireless Geographical Information Systems, 124-141 (Springer-Verlag).
• , On user-generated geocontent, in Proc. 12th Symposium on Spatial and Temporal Databases (Sstd) .
• , , & , Opinion mapping travelblogs, in Proc. Terra Cognita Workshop (In Conjunction With International Semantic Web Conf.), 23-36 .

### 2010

• et al., Collaborative information spaces: Research directions at imis, in Proc. 2nd Ercim Dis Workshop on Large-Scale and Federated Information Spaces .
• et al., Geoblogging: User-contributed geospatial data collection and fusion, in GIS ’10: Proceedings of the 18th Sigspatial International Conference on Advances in Geographic Information Systems, 532-533 (ACM).
• & , Geospatial route extraction from texts, in DMG ’10: Proceedings of the 1st Acm Sigspatial International Workshop on Data Mining for Geoinformatics, 29-37 (ACM).
• et al., Language-independent access to history textbooks: Utilizing gis functionality with spatiotemporal and thematic metadata, Transactions of GIS 14, 773–790.

### 2009

• et al., A new perspective on efficient and dependable vehicle routing, in GIS ’09: Proceedings of the 17th Acm Sigspatial International Conference on Advances in Geographic Information Systems, 388-391 (ACM).
• et al., Providing universal access to history textbooks: A modified gis case, in W2GIS ’09: Proceedings of the 9th International Symposium on Web and Wireless Geographical Information Systems, 87-102 (Springer-Verlag).
• et al., Utilizing wireless positioning as a tracking data source, in SSTD ’09: Proceedings of the 11th International Symposium on Advances in Spatial and Temporal Databases, 171-188 (Springer-Verlag).

### 2008

• et al., Dynamic travel time maps, in Encyclopedia of Gis, 255–260 (Encyclopedia of GIS, Springer-Verlag).
• et al., Dynamic travel time provision for road networks, in GIS ’08: Proceedings of the 16th Acm Sigspatial International Conference on Advances in Geographic Information Systems, 1-4 (ACM).
• , Floating car data, in Encyclopedia of Gis, 321 (Encyclopedia of GIS, Springer-Verlag).
• , Map-matching, in Encyclopedia of Gis, 632–633 (Encyclopedia of GIS, Springer-Verlag).
• et al., Qualitative geocoding of persistent web pages, in GIS ’08: Proceedings of the 16th Acm Sigspatial International Conference on Advances in Geographic Information Systems, 1-10 (ACM).

### 2007

• et al., Spatial data management aspects in archaeological excavation documentation, in Proc. AGILE Conf., 287-302 .

### 2006

• , , & , Addressing the need for map-matching speed: Localizing globalb curve-matching algorithms, in SSDBM ’06: Proceedings of the 18th International Conference on Scientific and Statistical Database Management, 379-388 (IEEE Computer Society).
• , , & , Dynamic travel time maps - enabling efficient navigation, in SSDBM ’06: Proceedings of the 18th International Conference on Scientific and Statistical Database Management, 369-378 (IEEE Computer Society).
• & , Introduction to the special issue, Geoinformatica 10, 5–7.

### 2005

• & , Data semantics in location-based services, , 168–195.
• , , & , Indeterminacy and spatiotemporal data: Basic definitions and case study, Geoinformatica 9, 211–236.
• et al., On map-matching vehicle tracking data, in VLDB ’05: Proceedings of the 31st International Conference on Very Large Data Bases, 853-864 (VLDB Endowment).
• , , & , Practical data management techniques for vehicle tracking data, in ICDE ’05: Proceedings of the 21st International Conference on Data Engineering, 324-325 (IEEE Computer Society).
• & , Trajectory indexing using movement constraints, Geoinformatica 9, 93–115.

### 2004

• , 12th Acm International Workshop on Geographic Information Systems (ACM Press).
ABSTRACT
• , , & , Modeling, storing, and mining moving object databases, in IDEAS ’04: Proceedings of the International Database Engineering and Applications Symposium, 68-77 (IEEE Computer Society).

### 2003

• et al., Access methods and query processing techniques, in Spatio-Temporal Databases: The Chorochronos Approach, 203-261 .
• et al., DBGlobe: A service-oriented p2p system for global computing, SIGMOD Rec. 32, 77–82.
• & , Generating semantics-based trajectories of moving objects, Computers, Environment and Urban Systems 27, 243–263.
• & , Indexing of network constrained moving objects, in GIS ’03: Proceedings of the 11th Acm International Symposium on Advances in Geographic Information Systems, 25-32 (ACM).
• , , & , Services-based data management in a global computing environment, in WISEW’03: Proceedings of the Fourth International Conference on Web Information Systems Engineering Workshops, 45-53 (IEEE Computer Society).
• , , & , Synthetic and real spatiotemporal datasets, IEEE Data Eng. Bull. 26, 26–32.

### 2002

• , Indexing the trajectories of moving objects, IEEE Data Eng. Bull. 25, 3–9.
• , , & , Metadata modeling in a global computing environment, in GIS ’02: Proceedings of the 10th Acm International Symposium on Advances in Geographic Information Systems, 68-73 (ACM).
• , , & , Revisiting r-tree construction principles, in ADBIS ’02: Proceedings of the 6th East European Conference on Advances in Databases and Information Systems, 149-162 (Springer-Verlag).

### 2001

• & , Capturing fuzziness and uncertainty of spatiotemporal objects, in ADBIS ’01: Proceedings of the 5th East European Conference on Advances in Databases and Information Systems, 112-126 (Springer-Verlag).
• & , Designing ontologies for moving objects applications, in Proc. of the Int’l Workshop on Complex Reasoning on Geographic Data .
• et al., Location-based services: A database perspective, in ScanGIS, 59-68 .
• & , Querying the trajectories of on-line mobile objects, in MobiDe ’01: Proceedings of the 2nd Acm International Workshop on Data Engineering for Wireless and Mobile Access, 66-73 (ACM).

### 2000

• , , & , Novel approaches in query processing for moving object trajectories, in VLDB ’00: Proceedings of the 26th International Conference on Very Large Data Bases, 395-406 (Morgan Kaufmann Publishers Inc.).

### 1999

• & , Capturing the uncertainty of moving-object representations, in SSD ’99: Proceedings of the 6th International Symposium on Advances in Spatial Databases, 111-132 (Springer-Verlag).
• & , Incremental join of time-oriented data, in SSDBM ’99: Proceedings of the 11th International Conference on Scientific and Statistical Database Management, 232 (IEEE Computer Society).

### 1998

• & , Requirements, definitions, and notations for spatiotemporal application environments, in GIS ’98: Proceedings of the 6th Acm International Symposium on Advances in Geographic Information Systems, 124-130 (ACM).

### 1997

• , , & , Modeling behavior of geographic objects: An experience with the object modeling technique, in CAiSE ’97: Proceedings of the 9th International Conference on Advanced Information Systems Engineering, 347-359 (Springer-Verlag).
• et al., Structuring space with image schemata: Wayfinding in airports as a case study, in COSIT ’97: Proceedings of the International Conference on Spatial Information Theory, 85-102 (Springer-Verlag).