01926nas a2200229   4500000000100000000000100001000000100002008004100003653001800044653002200062653001000084653002500094653001700119653001900136100001600155245012000171856014600291300001200437490000600449520122100455022002001676       2018                            d10acrowdsourcing10acultural heritage10aPPGIS10aPlace-based memories10aSocial media10aUrban planning1 aPilvi Nummi00aCrowdsourcing Local Knowledge with PPGIS and Social Media for Urban Planning to Reveal Intangible Cultural Heritage  uhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85045076885&doi=10.17645%2fup.v3i1.1266&partnerID=40&md5=9abacb1b0945c293ad8e590ad66f3c20  a100-1150 v33 aIn participatory urban planning, understanding local stakeholders’ viewpoints is central, and, thus, gathering local knowledge has become a frequent task in planning practice. However, the built cultural heritage is usually evaluated by experts neglecting the values and opinions of citizens. In this study, a crowdsourcing model for assessing local residents’ viewpoints and values related to the built cultural heritage of Nikkilä was developed. The aim was to find out if crowdsourcing with public participation GIS and social media is a functional method for revealing local people’s values, place-based memories and experiences. In the case study, non-professional knowledge was compared with expert knowledge and valuable knowledge about the intangible aspects of the built cultural heritage was reached through place-based memories. Apart from that, social media provided visual representations of place-based experiences and a tool for building a collective memory. Based on the results, it is evident that a multi-method crowdsourcing model can be a functional model for crowdsourcing local knowledge. However, there are several challenges in analysing data and using the knowledge in urban planning.  a21837635 (ISSN)