fix: despeckle ESA WorldCover grid to remove single-pixel land-cover noise (#1165)

.devcontainer/devcontainer.json

@@ -0,0 +1,25 @@
+{
+  "name": "Arnis - Rust Development",
+  "image": "rust:latest",
+  "features": {
+    "ghcr.io/devcontainers/features/github-cli:1": {}
+  },
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "rust-lang.rust-analyzer",
+        "vadimcn.vscode-lldb",
+        "tamasfe.even-better-toml",
+        "serayuzgur.crates"
+      ],
+      "settings": {
+        "rust-analyzer.checkOnSave.command": "clippy",
+        "[rust]": {
+          "editor.formatOnSave": true
+        }
+      }
+    }
+  },
+  "postCreateCommand": "apt-get update && apt-get install -y build-essential libssl-dev pkg-config libwebkit2gtk-4.1-dev libayatana-appindicator3-dev librsvg2-dev && cargo fetch",
+  "remoteUser": "root"
+}

.dockerignore

@@ -0,0 +1,8 @@
+target/
+.git/
+.gitignore
+README.md
+.vscode/
+.devcontainer/
+*.md
+.github/

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,85 @@
+name: Bug Report
+description: Report a bug to help us improve Arnis
+title: "[BUG] "
+labels: ["bug", "triage"]
+assignees: []
+
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to report a bug! 🐛
+        Please fill out this form as completely as possible.
+
+  - type: textarea
+    id: description
+    attributes:
+      label: Description
+      description: A clear and concise description of what the bug is
+      placeholder: "When I do X, Y happens instead of Z..."
+    validations:
+      required: true
+
+  - type: textarea
+    id: reproduction
+    attributes:
+      label: Steps to Reproduce
+      description: Steps to reproduce the behavior
+      placeholder: |
+        1. Set bounding box to...
+        2. Click on...
+        3. Select...
+        4. See error...
+    validations:
+      required: true
+
+  - type: textarea
+    id: expected
+    attributes:
+      label: Expected Behavior
+      description: What should have happened?
+      placeholder: "The world should generate successfully..."
+    validations:
+      required: true
+
+  - type: textarea
+    id: logs
+    attributes:
+      label: Error Logs / Screenshots
+      description: Paste error messages, logs, or attach screenshots
+      placeholder: |
+        ```
+        error output here
+        ```
+
+  - type: dropdown
+    id: os
+    attributes:
+      label: Operating System
+      options:
+        - Windows
+        - macOS
+        - Linux (Ubuntu)
+        - Linux (Alpine)
+        - Linux (Other)
+        - Docker
+    validations:
+      required: true
+
+  - type: input
+    id: rust-version
+    attributes:
+      label: Rust Version
+      description: Output of `rustc --version`
+      placeholder: "rustc 1.81.0"
+    validations:
+      required: false
+
+  - type: textarea
+    id: context
+    attributes:
+      label: Additional Context
+      description: Any other context about the problem?
+      placeholder: "I was trying to generate a map of..."
+    validations:
+      required: false

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -0,0 +1,59 @@
+name: Feature Request
+description: Suggest an idea for Arnis
+title: "[FEATURE] "
+labels: ["enhancement", "triage"]
+assignees: []
+
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for suggesting a feature! 🚀
+        Help us understand your idea by filling out this form.
+
+  - type: textarea
+    id: problem
+    attributes:
+      label: Problem / Use Case
+      description: Describe the problem this feature would solve
+      placeholder: "I want to be able to... because..."
+    validations:
+      required: true
+
+  - type: textarea
+    id: solution
+    attributes:
+      label: Proposed Solution
+      description: How should this feature work?
+      placeholder: "The feature should work by..."
+    validations:
+      required: true
+
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: Alternative Solutions
+      description: Any other approaches you've considered?
+      placeholder: "Another way could be..."
+    validations:
+      required: false
+
+  - type: textarea
+    id: context
+    attributes:
+      label: Additional Context
+      description: Any other information?
+      placeholder: "I saw this feature in..."
+    validations:
+      required: false
+
+  - type: checkboxes
+    id: priority
+    attributes:
+      label: Priority
+      options:
+        - label: "High - Blocks me from using Arnis"
+        - label: "Medium - Would improve my workflow"
+        - label: "Low - Nice to have"
+    validations:
+      required: true

.github/pull_request_template.md

@@ -0,0 +1,49 @@
+## Description
+
+Please include a summary of the changes and why they're needed.
+
+Fixes # (issue number)
+
+## Type of Change
+
+- [ ] Bug fix (non-breaking change that fixes an issue)
+- [ ] New feature (non-breaking change that adds functionality)
+- [ ] Breaking change (fix or feature that causes existing functionality to change)
+- [ ] Documentation update
+
+## Testing
+
+Please describe the testing you've done:
+
+- [ ] Unit tests added/updated
+- [ ] Manual testing completed
+- [ ] Tested on multiple platforms (if applicable)
+
+**Test Environment:**
+- OS: 
+- Rust Version: 
+- Build Method (Docker/Local/Dev Container): 
+
+**Steps to Test:**
+1. 
+2. 
+3. 
+
+## Checklist
+
+- [ ] I have read the [CONTRIBUTING.md](../CONTRIBUTING.md) guidelines
+- [ ] My code follows the Rust style guide (`cargo fmt`)
+- [ ] I have performed a self-review of my code
+- [ ] I have commented my code, particularly in complex areas
+- [ ] I have updated relevant documentation
+- [ ] My changes generate no new compiler warnings or Clippy lints
+- [ ] I have added tests that prove my fix is effective or that my feature works
+- [ ] New and existing unit tests pass locally with my changes
+
+## Screenshots (if applicable)
+
+Add screenshots for UI changes:
+
+Before:
+
+After:

.github/workflows/build.yml

@@ -0,0 +1,43 @@
+name: Build Arnis
+
+on:
+  push:
+    branches:
+      - "**"
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Cache Cargo
+        uses: Swatinem/rust-cache@v2
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y \
+            libgtk-3-dev \
+            libwebkit2gtk-4.1-dev \
+            libayatana-appindicator3-dev \
+            librsvg2-dev \
+            patchelf \
+            build-essential \
+            pkg-config
+
+      - name: Build
+        run: cargo build --release
+
+      - name: Upload binary
+        uses: actions/upload-artifact@v4
+        with:
+          name: arnis-linux
+          path: target/release/

.github/workflows/tests.yml

@@ -0,0 +1,85 @@
+name: Tests
+
+on:
+  push:
+    branches: [ main, develop ]
+  pull_request:
+    branches: [ main, develop ]
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        rust: [stable, nightly]
+
+    steps:
+    - uses: actions/checkout@v7
+
+    - name: Install Rust
+      uses: dtolnay/rust-toolchain@master
+      with:
+        toolchain: ${{ matrix.rust }}
+
+    - name: Cache cargo registry
+      uses: actions/cache@v6
+      with:
+        path: ~/.cargo/registry
+        key: ${{ runner.os }}-cargo-registry-${{ hashFiles('**/Cargo.lock') }}
+
+    - name: Cache cargo index
+      uses: actions/cache@v6
+      with:
+        path: ~/.cargo/git
+        key: ${{ runner.os }}-cargo-git-${{ hashFiles('**/Cargo.lock') }}
+
+    - name: Cache cargo build
+      uses: actions/cache@v6
+      with:
+        path: target
+        key: ${{ runner.os }}-cargo-build-target-${{ hashFiles('**/Cargo.lock') }}
+
+    - name: Install dependencies (Ubuntu)
+      if: runner.os == 'Linux'
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y libssl-dev pkg-config libwebkit2gtk-4.1-dev libayatana-appindicator3-dev librsvg2-dev
+
+    - name: Install dependencies (macOS)
+      if: runner.os == 'macOS'
+      run: brew install webkit2gtk
+
+    - name: Run tests
+      run: cargo test --verbose
+
+    - name: Run clippy
+      run: cargo clippy -- -D warnings
+
+    - name: Check formatting
+      run: cargo fmt -- --check
+
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+
+    steps:
+    - uses: actions/checkout@v7
+
+    - name: Install Rust
+      uses: dtolnay/rust-toolchain@stable
+
+    - name: Install dependencies (Ubuntu)
+      if: runner.os == 'Linux'
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y libssl-dev pkg-config libwebkit2gtk-4.1-dev libayatana-appindicator3-dev librsvg2-dev
+
+    - name: Install dependencies (macOS)
+      if: runner.os == 'macOS'
+      run: brew install webkit2gtk
+
+    - name: Build
+      run: cargo build --release --verbose