Due to the crucial role of federal-states in its federal structure, German parties have been accompanied with certain intraparty tensions between federal- and state-level parties. To investigate the relationship between federal-level and state-level politics, there are numerous attempts to identify state-level parties' positions independently from the federal ones. To this line of research this paper contributes by utilizing new information source: Wahl-O-Mat. Wahl-O-Mat is a German version of voting advice application which has been available not only at the federal-level parliament elections but also at the state-level elections since 2002. This application provides us the expert evaluation of individual parties' position to a variety of issues. While individual state-level elections take place on the basis of different sets of issues there are also certain crossover in individual issues. Using this kind of common issues we connect all positional data of state-level parties with each other. This data is further analyzed using item-response-model to extract the latent ideological dimensions in which the state-level party competitions take place. This paper also conduct validation tests of the extracted space by comparing with further estimates based on the state-level party manifestos.
