Journal articles

Li, M., Westerholt, R. and Zipf, A. (2018): Do people communicate about their whereabouts? Investigating the relation between user-generated text messages and Foursquare check-in places. Geo-spatial Information Science, 21 (3). DOI: 10.1080/10095020.2018.1498669.

Westerholt, R., Resch, B., Mocnik, F.-B., and Hoffmeister, D. (2018): A statistical test on the local effects of spatially structured variance. International Journal of Geographical Information Science, 32 (3), 571—600. DOI: 10.1080/13658816.2017.1402914.

Li, M., Westerholt, R., Fan, H. and Zipf, A. (2018): Assessing spatiotemporal predictability of LBSN: A case study of three Foursquare datasets. GeoInformatica, 22 (3), 541—561. DOI: 10.1007/s10707-016-0279-5.

Bluemke, M., Resch, B., Lechner, C., Westerholt, R. and Kolb, JP. (2017): Integrating Geographic Information into Survey Research: Current Applications, Challenges and Future Avenues. Survey Research Methods, 11 (3), 307—327. DOI: 10.18148/srm/2017.v11i3.6733.

Borgmann, P., Westerholt, R., Oevermann, S. and Zachgo, S. (2017): Webbasierte und mobile Datenerfassung im Projekt „Netzwerk zum Schutz gefährdeter Wildpflanzen in Deutschland (WIPs-De)“. Natur und Landschaft, 92 (2), 69—75. DOI: 10.17433/2.2017.50153439.69-75.

Westerholt, R., Steiger, E., Resch, B. and Zipf, A. (2016): Abundant Topological Outliers in Social Media Data and Their Effect on Spatial Analysis. PLOS ONE, 11 (9), e0162360. DOI: 10.1371/journal.pone.0162360.

Steiger, E., Westerholt, R., Resch, B. and Zipf, A. (2015): Twitter as an indicator for whereabouts of people? Correlating Twitter with UK census data. Computers, Environment and Urban Systems, 54, 255—265. DOI: 10.1016/j.compenvurbsys.2015.09.007.

Westerholt, R., Resch, B. and Zipf, A. (2015): A local scale-sensitive indicator of spatial autocorrelation for assessing high- and low-value clusters in multi-scale datasets. International Journal of Geographical Information Science, 29 (5), 868—887. DOI: 10.1080/13658816.2014.1002499.

Westerholt, R. and Resch, B. (2014): Asynchronous Geospatial Processing: An Event-Driven Push-Based Architecture for the OGC Web Processing Service. Transactions in GIS, 19 (3), 455—479. DOI: 10.1111/tgis.12104.

Conference papers

Westerholt R., Mocnik, F.-B., Zipf, A. (2018): Introduction to the PLATIAL’18 Workshop on Platial Analysis. In: Westerholt R., Mocnik, F.-B., Zipf, A. (eds) Proceedings of the 1st Workshop on Platial Analysis (PLATIAL’18). Heidelberg, Germany, 1—5. DOI: 10.5281/zenodo.1475267.

Westerholt, R., Gröbe, M., Zipf, A. and Burghardt, D. (2018): Towards the statistical analysis and visualization of places. 10th International Conference on Geographic Information Science, Melbourne, Australia, DOI: LIPIcs.GIScience.2018.63.

Westerholt, R. (2018): The impact of the spatial superimposition of point based statistical configurations on assessing spatial autocorrelation. In: Proceedings of the 21st AGILE Conference on Geographic Information Science, Lund, Sweden.

Westerholt, R. (2017): Topological and scale-related issues in Twitter analyses through superimposed forms of spatial heterogeneity. Annual Meeting of the American Association of Geographers 2017, Boston, MA.

Borgmann, P. and Westerholt, R. (2015): Citizen Science im Botanischen Artenschutz. Dialogforum Citizen Science, German Federal Environmental Foundation, Osnabrück, Germany.

Reimer, A. and Westerholt, R. (2014): Schematization for the analysis of geolocated microblog messages. In: Proceedings of AutoCarto 2014, International Symposium on Automated Cartography, Pittsburgh, PA.

Westerholt, R., Borgmann, P. and Zimmer, B. (2012): WebMapping-basierte Erfassung pflanzengenetischer Ressourcen in der Botanik. In: Löwner, M.-O., Hillen, F. and Wohlfahrt, R. (eds.): Geoinformatik 2012 „Mobilität und Umwelt“. Aachen: Shaker-Verlag, 411—414.

Borgmann, P., Westerholt, R., Zimmer, B. and Zachgo, S. (2012): Einsatz eines Geoportals in der Saatguterfassung. In: Lohwasser, U., Zachgo, S. und Börner, A. (ed.): Saatguterhaltung und Nutzbarmachung von Kulturpflanzen und heimischen Wildarten. Nürtingen: Gesellschaft für Pflanzenbauwissenschaften e.V., Berichte der Gesellschaft für Pflanzenbauwissenschaften, volume 6, 17—19.

Book chapters

Steiger, E., Westerholt, R. and Zipf, A. (2016): Research on social media feeds—A GIScience perspective. In: Capineri, C, Haklay, M, Huang, H, Antoniou, V, Kettunen, J, Ostermann, F and Purves, R. (eds.): European Handbook of Crowdsourced Geographic Information, London: Ubiquity Press, 237—254. DOI: 10.5334/bax.r.


Westerholt R., Mocnik, F.-B., Zipf, A. (2018, eds.): On the Way to Platial Analysis: Can Geosocial Media Provide the Necessary Impetus? Proceedings of the 1st Workshop on Platial Analysis (PLATIAL’18). Heidelberg, Germany. DOI: 10.5281/zenodo.1475269.

Borgmann, P., Westerholt, R., Oevermann, S. and Zachgo, S. (2014): WEL-Webmapping. In: Poschlod, P., Borgmann, P., Listl, D., Reisch, C. and Zachgo, S. (eds.): Handbuch Genbank WEL. Regensburg: HOPPEA Denkschriften der Regensburgischen Botanischen Gesellschaft, 133—140.