added datasets

- Released 1.0.9 for awesome gee community catalog & catalog stats
- Added [USGS Historical Topo Maps](https://samapriya.github.io/awesome-gee-community-datasets/projects/usgs_topo)
- Weekly updates to [USDM drought monitor](https://samapriya.github.io/awesome-gee-community-datasets/projects/usdm/)

docs/changelog.md

@@ -2,6 +2,11 @@
 
 ![GEE Community Datasets](https://img.shields.io/endpoint?url=https://gist.githubusercontent.com/samapriya/34bc0c1280d475d3a69e3b60a706226e/raw/community.json)
 
+#### Updated 2023-08-08
+- Released 1.0.9 for awesome gee community catalog & catalog stats
+- Added [USGS Historical Topo Maps](https://samapriya.github.io/awesome-gee-community-datasets/projects/usgs_topo)
+- Weekly updates to [USDM drought monitor](https://samapriya.github.io/awesome-gee-community-datasets/projects/usdm/)
+
 #### Updated 2023-07-20
 - Added [Global Human Settlement Layer 2023](https://samapriya.github.io/awesome-gee-community-datasets/projects/ghsl)
 - Added [Global 30m Landsat Tree Canopy Cover v4](https://samapriya.github.io/awesome-gee-community-datasets/projects/global_tcc)

docs/projects/usgs_topo.md

@@ -0,0 +1,38 @@
+# USGS Historical Topo Maps
+
+**This dataset is currently only available to those in the [insiders program](https://gee-community-catalog.org/insiders/)**
+
+The history of USGS Topo Maps traces back to the late 19th century when the USGS embarked on a mission to map the entire United States in intricate detail. The 1:24,000 scale, also known as 7.5-minute quadrangle maps, emerged as one of the most widely used scales. Each map sheet covers an area of 7.5 minutes of longitude and latitude, resulting in a detailed representation of approximately 64 square miles (166 square kilometers).
+
+A subset of these are ingested into the overall collection about 81,000+ and improvements and additions will be made in the future. Metadata including state name, place name and scale. States like Texas, California and others were not added directly but might be added over time.
+
+You can read about the [preprocessing steps here](https://samapriyaroy.medium.com/from-paper-to-pixels-rediscovering-historical-usgs-topo-maps-in-the-google-earth-engine-community-f514c97c46a)
+
+#### Citation
+
+```
+United States Geological Survey. (2019). Yosemite National Park [Topographic map, Map No. 12345]. 1:24,000. U.S. Geological Survey.
+```
+
+![USGS topo](https://i.imgur.com/27YEevwh.gif)
+
+
+#### Code Snippet
+
+```js
+var usgs_topo = ee.ImageCollection("projects/sat-io/open-datasets/USGS/historical_topo");
+```
+
+Sample code: https://code.earthengine.google.com/?scriptPath=users/sat-io/awesome-gee-catalog-examples:analysis-ready-data/USGS-TOPO-RENDER
+
+#### License & Terms of Use
+
+USGS topographic maps are typically in the public domain, which means they are not protected by copyright and can be freely used, reproduced, and distributed. The USGS allows the public to access and use its maps for various purposes without the need for a formal license or permission.
+
+Provided by: USGS
+
+Curated in GEE by : Samapriya Roy
+
+keywords: USGS, Historical Topographical Maps, Orthophoto mosaics, Topography,Cartography
+
+Last updated on GEE: 2023-07-21

mkdocs.yml

@@ -146,6 +146,7 @@ nav:
       - Canada High Resolution Digital Elevation Model (HRDEM): projects/hrdem.md
       - swissSURFACE3D Raster Digital Surface Model (DSM): projects/swiss3d.md
       - Carbon Mapper Data Portal Methane Emissions: projects/cmapper.md
+      - USGS Historical Topo Maps: projects/usgs_topo.md
   - Population & Socioeconomic:
       - High Resolution Settlement Layers: projects/hrsl.md
       - LandScan Population Data: projects/landscan.md