Add elevation data and contour lines

[ngoiyaeric]

User description

Add elevation data and contour lines to Mapbox map and implement location-based queries.

• Mapbox Map Initialization:

  • Add contour lines source and layer to components/map/mapbox-map.tsx.
  • Set contour lines with specific paint properties.

• Location Tool:

  • Create lib/agents/tools/location.tsx to handle location-based queries.
  • Implement function to query elevation data and contour lines from Mapbox.
  • Export location tool for use in getTools function.

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PR Type

enhancement, other

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Description

• Added contour lines to the Mapbox map by introducing a new vector source and layer with specific layout and paint properties.
• Implemented a new location tool to query elevation data and contour lines from Mapbox, including error handling for API requests.

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Changes walkthrough 📝

	Relevant files
Enhancement	mapbox-map.tsx Add contour lines to Mapbox map                                                    components/map/mapbox-map.tsx Added a new vector source for contour lines. Implemented a new layer for contour lines with specific layout and paint properties. +21/-0
Other	location.tsx Implement location tool for elevation queries                        lib/agents/tools/location.tsx Created a new tool for querying elevation data and contour lines. Implemented an API call to Mapbox for elevation data. Added error handling for API requests. +48/-0

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PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 2 🔵🔵⚪⚪⚪

🧪 No relevant tests

🔒 Security concerns Sensitive information exposure: The Mapbox access token is being used directly in the client-side code (line 27 in lib/agents/tools/location.tsx). Although it's referenced as an environment variable, if this token has broad permissions, it could potentially be misused if exposed to the client. Consider using a server-side API route to make the Mapbox API call instead, keeping the access token secure on the server.

⚡ Recommended focus areas for review Performance Concern The addition of contour lines might impact map rendering performance, especially for larger areas or on less powerful devices. Consider implementing conditional rendering or level-of-detail optimization for contour lines. Error Handling The error handling in the location tool could be more specific. Consider differentiating between network errors, API errors, and other types of errors to provide more informative feedback.

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PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Score
Possible issue	✅ Validate input coordinates to prevent invalid API requests and improve error handling ___ **Consider adding input validation for latitude and longitude to ensure they are within valid ranges before making the API call.** [lib/agents/tools/location.tsx [20-23]](https://github.com/QueueLab/mapgpt/pull/68/files#diff-d6ba731b6c7bcda968f519474e396941eaa525a635619710fe69e6e9f9b1d177R20-R23) ```diff execute: async ({ latitude, longitude }: { latitude: number; longitude: number }) => { +if (latitude < -90 || latitude > 90 || longitude < -180 || longitude > 180) { + throw new Error('Invalid latitude or longitude values'); +} let hasError = false; const streamResults = createStreamableValue(); uiStream.append( Loading elevation data and contour lines... ); ``` `[Suggestion has been applied]` Suggestion importance[1-10]: 9 Why: Adding input validation for latitude and longitude is crucial to prevent invalid API requests, which can cause errors and unnecessary API usage, making this a high-impact improvement.	9
Performance	✅ Implement caching for API responses to reduce API calls and improve performance ___ **Implement rate limiting or caching mechanism for API calls to avoid potential overuse of the Mapbox API and improve performance.** [lib/agents/tools/location.tsx [26-28]](https://github.com/QueueLab/mapgpt/pull/68/files#diff-d6ba731b6c7bcda968f519474e396941eaa525a635619710fe69e6e9f9b1d177R26-R28) ```diff +const cachedResponse = await checkCache(longitude, latitude); +if (cachedResponse) { + return cachedResponse; +} const response = await fetch( `https://api.mapbox.com/v4/mapbox.mapbox-terrain-v2/tilequery/${longitude},${latitude}.json?layers=contour&access_token=${process.env.NEXT_PUBLIC_MAPBOX_ACCESS_TOKEN}` ); +await cacheResponse(longitude, latitude, response); ``` `[Suggestion has been applied]` Suggestion importance[1-10]: 8 Why: Implementing caching can significantly reduce the number of API calls, improving performance and reducing the risk of exceeding API rate limits, which is a valuable enhancement.	8
Enhancement	✅ Implement more granular error handling for improved error reporting and user experience ___ **Add more specific error handling to provide clearer error messages and potentially handle different types of errors differently.** [lib/agents/tools/location.tsx [30-32]](https://github.com/QueueLab/mapgpt/pull/68/files#diff-d6ba731b6c7bcda968f519474e396941eaa525a635619710fe69e6e9f9b1d177R30-R32) ```diff if (!response.ok) { - throw new Error(`Error: ${response.status}`); + if (response.status === 404) { + throw new Error('Elevation data not found for the given coordinates.'); + } else if (response.status === 429) { + throw new Error('Rate limit exceeded. Please try again later.'); + } else { + throw new Error(`Unexpected error: ${response.status}`); + } } ``` `[Suggestion has been applied]` Suggestion importance[1-10]: 7 Why: More specific error handling can provide clearer feedback to users and help diagnose issues more effectively, enhancing the user experience and debugging process.	7
	Use a more appropriate color for contour lines to enhance map readability and aesthetics ___ **Consider using a more neutral color for contour lines to improve visibility and aesthetics. A softer color like '#brown' or '#808080' might be more suitable for topographic representation.** [components/map/mapbox-map.tsx [125-128]](https://github.com/QueueLab/mapgpt/pull/68/files#diff-ce7ea3ef85a6812c7da39941ffa47e8e0fadbb3fc7c391cf1cafd96303cf3a0fR125-R128) ```diff paint: { - 'line-color': '#ff69b4', + 'line-color': '#8B4513', // Saddle Brown 'line-width': 1 } ``` - [ ] **Apply this suggestion** Suggestion importance[1-10]: 5 Why: The suggestion to change the contour line color to a more neutral tone could improve map readability and aesthetics, but it is subjective and may not be necessary depending on the overall design intent.	5

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