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diff --git a/docs/assets/proxy-map.png b/docs/assets/proxy-map.png
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diff --git a/docs/components/proxies/query.md b/docs/components/proxies/query.md
new file mode 100644
index 0000000000000000000000000000000000000000..5c89ce1826f363bd2ac2a4e26fcbed04b9d27525
--- /dev/null
+++ b/docs/components/proxies/query.md
@@ -0,0 +1,52 @@
+# Query proxy
+
+## Features
+
+This proxy provides an interface between the data portal, which use cookies and JWT token as authentication means, and the server hosting map services and dataset related files which only understands basic authentication.
+
+The proxy plays a role in to functionalities of the portal:
+
+- the display of data on the map
+- the download of the data under different output formats
+
+Depending on the dataset's license, those services/files might be in open access or restricted access. Our goal is to display to a particular user exactly what it's accesses are allowing him to see.
+
+Though, in order for the map to work properly and to always be able to display the full data on the portal, it has been decided that WMS would always be opened even if the user doesn't have access to the dataset.
+
+## Dependencies
+
+The dependencies of the proxy are:
+
+- `Elasticsearch`: used to verify whether a dataset is in open access or not, and if the user has access to the MVT layer pour the /map endpoints
+- `Legacy auth Middleware`: used to verify if the user has access to the service of the requested layer
+- `MapServer`: which expose the WMS and MVT services
+- the server hosting static files
+
+## Endpoints
+
+It provides the following endpoints:
+
+- `/map`: which proxy requests for the map feature, the sub-routes are:
+  - `/wms`: which proxy requests to the WMS service
+  - `/mvt`: which proxy requests to the MVT service
+  - `/ign`: which proxy requests to the IGN ortho layer adding the API key
+- `/download`: which proxy requests for the download feature, the sub-routes are
+  - `/wms`
+  - `/wfs`
+  - `/ws`
+  - `/kml`
+  - `/wcs`
+  - `/files`
+  - `/catalogue`
+
+## Implementation
+
+This proxy has been written in [Node.js](https://nodejs.org/) using the framework [Express](https://expressjs.com/) and the [http-proxy](https://github.com/http-party/node-http-proxy) node module to proxy requests.
+
+The following diagram explains the logic implemented behind /map:
+
+![Proxy map diagram sequence](../../assets/proxy-map.png)
+
+The following diagram sequence explains what is happening behind the `/download` endpoint.
+
+![Proxy download diagram sequence](../../assets/proxy-download.png)
diff --git a/docs/components/proxies/web-mapping-services.md b/docs/components/proxies/web-mapping-services.md
deleted file mode 100644
index c2dbca7905d763dace995577b955ce5abcf5dc4d..0000000000000000000000000000000000000000
--- a/docs/components/proxies/web-mapping-services.md
+++ /dev/null
@@ -1,30 +0,0 @@
-# Web mapping services
-
-## Features
-
-This service is the unique entrypoint of the map in the portal toward the geographical services of the datasets hosted on our platform. It proxifies two services:
-
-* `WMS`
-* `MVT`
-
-Depending on the dataset's license, those services might be in open access or restricted access. Our goal is to display to a particular user exactly what it's access are allowing him to see. It wasn't possible to add the authentication pieces as the map services are expecting it (basic auth) directly from the web application this is why we created this proxy.
-
-In order for the map to work properly and to always be able to display the full data on the portal, it has been decided that WMS would always be opened even if the user doesn't have access to the dataset.
-
-## Dependencies
-
-This proxy has two dependencies:
-
-* `Elasticsearch`: used to verify whether the user has access to the requested service and for the specified layer
-* `MapServer`: which expose the WMS and MVT services
-
-## Endpoints
-
-It provides two endpoints:
-
-* `/wms`: which proxy request to the WMS service
-* `/mvt`: which proxy request to the MVT service
-
-## Implementation
-
-This proxy has been written in [Node.js](https://nodejs.org/) and based on [http-proxy](https://github.com/http-party/node-http-proxy) node module.
diff --git a/docs/overview/index.md b/docs/overview/index.md
index 2db302d1983d46cdc3b65275197bdeb250f0d5aa..7195a8768f9183bb4ca9db2c0862239c81c4725e 100644
--- a/docs/overview/index.md
+++ b/docs/overview/index.md
@@ -113,7 +113,7 @@ M1 | Legacy AUTH | Facilitating the interaction between the Web Portal Authentic
 
 ID | Name | Usage | Lang | Repo | Doc | Deps
 --- | --- | --- | --- | --- | --- | ---
-P1 | Web Mapping Services| Proxying requests that the Web Portal performs against the cartographic Web Services (WMS, MVT) hosted by data.grandlyon.com's Core macro-component | TypeScript | [Link](https://forge.grandlyon.com/web-et-numerique/web-et-numerique-internet/data.grandlyon.com/web-portal/components/proxies/web-mapping-services) | [Link](../components/proxies/web-mapping-services.md) | A1, C4
+P1 | Web Mapping Services| Proxying requests that the Web Portal performs against the cartographic Web Services (WMS, MVT) hosted by data.grandlyon.com's Core macro-component | TypeScript | [Link](https://forge.grandlyon.com/web-et-numerique/web-et-numerique-internet/data.grandlyon.com/web-portal/components/proxies/query) | [Link](../components/proxies/query.md) | A1, C4
 
 
 
diff --git a/mkdocs.yml b/mkdocs.yml
index 1f25d50eccdd1609c4f146467fb0011909e8bbe6..81ed27fd48a608d230422fa8eafdaf282feb67b6 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -4,7 +4,7 @@ site_author: Métropole de Lyon
 
 theme:
   name: null
-  custom_dir: 'custom-material-theme'
+  custom_dir: "custom-material-theme"
   language: en
   palette:
     primary: dark-blue
@@ -20,69 +20,69 @@ theme:
 extra_css: [extra.css]
 
 markdown_extensions:
-    - plantuml_markdown:
-        server: http://www.plantuml.com/plantuml
+  - plantuml_markdown:
+      server: http://www.plantuml.com/plantuml
 
 nav:
-    - Home: index.md
-    - Overview: overview/index.md
-    - Architecture: architecture/index.md
-    - Components:
+  - Home: index.md
+  - Overview: overview/index.md
+  - Architecture: architecture/index.md
+  - Components:
       - Core Components:
-        - Legacy AUTH: components/core/legacy-auth.md
+          - Legacy AUTH: components/core/legacy-auth.md
       - Custom apps:
-        - Web App:
-          - Overview: components/custom-apps/web-app/overview.md
-          - Homepage: components/custom-apps/web-app/homepage.md
-          - Changelog: components/custom-apps/web-app/changelog.md
-          - Feedback: components/custom-apps/web-app/feedback.md
-          - Reuses: components/custom-apps/web-app/reuses.md
-          - Partners: components/custom-apps/web-app/partners.md
-          - Credits: components/custom-apps/web-app/credits.md
-          - Static pages: components/custom-apps/web-app/static-pages.md
-          - Dataset:
-            - Data: components/custom-apps/web-app/dataset/data.md
-            - Information: components/custom-apps/web-app/dataset/info.md
-            - API & Downloads: components/custom-apps/web-app/dataset/resources.md
-          - Header: components/custom-apps/web-app/header.md
-          - Footer: components/custom-apps/web-app/footer.md
-          - Drafts: components/custom-apps/web-app/drafts.md
-          - Side Menu: components/custom-apps/web-app/side-menu.md
-          - User management: components/custom-apps/web-app/user-management.md
-          - Contact: components/custom-apps/web-app/contact.md
-          - Search: components/custom-apps/web-app/search.md
-        - Admin GUI: components/custom-apps/admin-gui.md
+          - Web App:
+              - Overview: components/custom-apps/web-app/overview.md
+              - Homepage: components/custom-apps/web-app/homepage.md
+              - Changelog: components/custom-apps/web-app/changelog.md
+              - Feedback: components/custom-apps/web-app/feedback.md
+              - Reuses: components/custom-apps/web-app/reuses.md
+              - Partners: components/custom-apps/web-app/partners.md
+              - Credits: components/custom-apps/web-app/credits.md
+              - Static pages: components/custom-apps/web-app/static-pages.md
+              - Dataset:
+                  - Data: components/custom-apps/web-app/dataset/data.md
+                  - Information: components/custom-apps/web-app/dataset/info.md
+                  - API & Downloads: components/custom-apps/web-app/dataset/resources.md
+              - Header: components/custom-apps/web-app/header.md
+              - Footer: components/custom-apps/web-app/footer.md
+              - Drafts: components/custom-apps/web-app/drafts.md
+              - Side Menu: components/custom-apps/web-app/side-menu.md
+              - User management: components/custom-apps/web-app/user-management.md
+              - Contact: components/custom-apps/web-app/contact.md
+              - Search: components/custom-apps/web-app/search.md
+          - Admin GUI: components/custom-apps/admin-gui.md
       - Off-the-shelf applications:
-        - API Gateway: components/off-the-shelf-apps/api-gateway.md
-        - Headless CMS: components/off-the-shelf-apps/cms.md
-        - Search Engine: components/off-the-shelf-apps/elasticsearch.md
+          - API Gateway: components/off-the-shelf-apps/api-gateway.md
+          - Headless CMS: components/off-the-shelf-apps/cms.md
+          - Search Engine: components/off-the-shelf-apps/elasticsearch.md
       - Middlewares:
-        - Legacy AUTH: components/middlewares/legacy-auth.md
+          - Legacy AUTH: components/middlewares/legacy-auth.md
       - Proxies:
-        - Web mapping services: components/proxies/web-mapping-services.md
+          - Web mapping services: components/proxies/query.md
       - Miscellaneous:
-        - Maintenance page: components/miscellaneous/maintenance-page.md
+          - Maintenance page: components/miscellaneous/maintenance-page.md
       - Indexers:
-        - Metadata and Data: components/indexers/metadata-and-data.md
-        - Editorial Content: components/indexers/editorial-content.md
+          - Metadata and Data: components/indexers/metadata-and-data.md
+          - Editorial Content: components/indexers/editorial-content.md
       - Services:
-        - Authentication: components/services/authentication.md
-        - Changelog: components/services/changelog.md
-        - Credits: components/services/credits.md
-        - Reuses: components/services/reuses.md
-        - CSV Catalog Downloader: components/services/csv-catalog-downloader.md
-        - Mailer: components/services/mailer.md
-        - Media Library: components/services/media-library.md
-        - Organizations: components/services/organizations.md
-        - Resources helper: components/services/resources-helper.md
-        - Social media share helper: components/services/social-media-share-helper.md
+          - Authentication: components/services/authentication.md
+          - Changelog: components/services/changelog.md
+          - Credits: components/services/credits.md
+          - Reuses: components/services/reuses.md
+          - CSV Catalog Downloader: components/services/csv-catalog-downloader.md
+          - Mailer: components/services/mailer.md
+          - Media Library: components/services/media-library.md
+          - Organizations: components/services/organizations.md
+          - Resources helper: components/services/resources-helper.md
+          - Social media share helper: components/services/social-media-share-helper.md
       - Tools:
-        - Minio master-slave mirror: components/tools/minio-master-slave-mirror.md
-    - Administration: administration/admin-tools.md
-    - Deployment:
+          - Minio master-slave mirror: components/tools/minio-master-slave-mirror.md
+  - Administration: administration/admin-tools.md
+  - Deployment:
       - 2019 deployment of the first public beta version: deployment/beta-deployment.md
-    - Monitoring: monitoring/monitoring.md
-    - Other:
+  - Monitoring: monitoring/monitoring.md
+  - Other:
       - Security: miscellaneous/security.md
       - NestJS-based micro-services: miscellaneous/nestjs-micro-services.md
       - Accessibility: miscellaneous/accessibility.md