ShowMeOnMap

Add bivariate fusion layer

add_fusion_layer

Spatially join two existing layers and add a new layer that encodes both values per region as a 3x3 bivariate choropleth. Both layers must already exist in the workspace. Auto-detects the numeric value field from each layer's viz config; pass value_field_a / value_field_b to override. Returns the new layer_id, correlation r, and matched-feature count. Required: map_id, layer_a_id, layer_b_id.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`mode`	No		bivariate
`map_id`	Yes
`rationale`	No	Optional short label (≤300 chars) for the map edit history, e.g. "add wildfire layer". Omit it to send nothing beyond the tool arguments.
`layer_a_id`	Yes
`layer_b_id`	Yes
`new_layer_id`	No
`value_field_a`	No
`value_field_b`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed2 schema fields changedSep 29, 2026

changedInput schema / properties / rationale / description

Previous value: -"Short audit-log label (≤300 chars) stating the user-facing goal this call serves, e.g. \"add wildfire layer for the user's California query\". Required on every call. Stored in the operations log so map edits stay traceable — we never see your chat history."New value: +"Optional short label (≤300 chars) for the map edit history, e.g. \"add wildfire layer\". Omit it to send nothing beyond the tool arguments."

changedInput schema / required

Previous value: -[
-  "map_id",
-  "layer_a_id",
-  "layer_b_id",
-  "rationale"
-]New value: +[
+  "map_id",
+  "layer_a_id",
+  "layer_b_id"
+]

First observedJul 19, 2026

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