Tucson migrant advocates have designed a new tool to help track immigration-related enforcement in and around the city as arrests surge under President Donald Trump’s mass deportation initiative.

Tucson Migra Map allows people to document and visualize enforcement activities by Immigration and Customs Enforcement and other federal agencies. While revealing patterns, the tool also raises questions about safety, transparency and the limits of public tracking tools.

“It indicates the level of chaos and how disruptive it is to our community,” activist Lucia Vindiola said in a statement.…