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;\n}\n\nfunction normalizeData(data) {\n const flatData = data.flat();\n const min = Math.min(...flatData);\n const max = Math.max(...flatData);\n return data.map(trace => \n trace.map(value => (value - min) / (max - min))\n );\n}\n\nfunction App() {\n const [plotData, setPlotData] = useState(null);\n const [isLoading, setIsLoading] = useState(true);\n\n useEffect(() => {\n fetchDefaultSEGY();\n }, []);\n\n const fetchDefaultSEGY = async () => {\n setIsLoading(true);\n try {\n const response = await fetch('/process-default-segy');\n if (!response.ok) {\n throw new Error('Failed to process default SEG-Y file');\n }\n const data = await response.json();\n setPlotData(data);\n } catch (error) {\n console.error('Error processing default SEG-Y file:', error);\n alert('Error processing default SEG-Y file. Please try uploading your own file.');\n } finally {\n setIsLoading(false);\n }\n };\n\n const handleFileUpload = async (event) => {\n const file = event.target.files[0];\n if (!file) return;\n\n setIsLoading(true);\n\n const formData = new FormData();\n formData.append('segyFile', file);\n\n try {\n const response = await fetch('/process-segy', {\n method: 'POST',\n body: formData,\n });\n\n if (!response.ok) {\n throw new Error('Failed to process SEG-Y file');\n }\n\n const data = await response.json();\n setPlotData(data);\n } catch (error) {\n console.error('Error processing SEG-Y file:', error);\n alert('Error processing SEG-Y file. Please try again.');\n } finally {\n setIsLoading(false);\n }\n };\n\n return (\n

SEG-Y File Plotter

\n \n {isLoading &&

Processing SEG-Y file...

}\n {plotData && }\n

\n );\n}\n\nfunction client() {\n createRoot(document.getElementById(\"root\")).render();\n}\n\nif (typeof document !== \"undefined\") { client(); }\n\nfunction processSEGY(data: Uint8Array) {\n const binaryHeaderOffset = 3200;\n const traceDataOffset = 3600; // Start of trace data\n const traceHeaderSize = 240;\n const samplesPerTraceOffset = 114; // Offset in trace header for number of samples\n\n // Read data sample format code from binary header\n const dataFormatCode = new DataView(data.buffer).getInt16(binaryHeaderOffset + 24, false); // 3225-3226 offset\n\n const traces = [];\n let offset = traceDataOffset;\n\n while (offset < data.length) {\n // Read number of samples for this trace\n const samplesPerTrace = new DataView(data.buffer).getUint16(offset + samplesPerTraceOffset, false);\n \n // Skip trace header\n offset += traceHeaderSize;\n\n // Read trace data\n let traceData;\n switch (dataFormatCode) {\n case 1: // 4-byte IBM floating point\n traceData = new Float32Array(samplesPerTrace);\n for (let i = 0; i < samplesPerTrace; i++) {\n traceData[i] = ibmToIeee(new DataView(data.buffer).getUint32(offset + i * 4, false));\n }\n break;\n case 2: // 4-byte fixed point\n traceData = new Int32Array(data.buffer.slice(offset, offset + samplesPerTrace * 4));\n break;\n case 3: // 2-byte fixed point\n traceData = new Int16Array(data.buffer.slice(offset, offset + samplesPerTrace * 2));\n break;\n case 4: // 4-byte fixed point with gain code (not implemented)\n console.warn(\"4-byte fixed point with gain code not implemented\");\n return { data: [] };\n case 5: // 4-byte IEEE floating point\n traceData = new Float32Array(data.buffer.slice(offset, offset + samplesPerTrace * 4));\n break;\n default:\n console.warn(`Unsupported data format code: ${dataFormatCode}`);\n return { data: [] };\n }\n\n traces.push(Array.from(traceData));\n\n offset += samplesPerTrace * (dataFormatCode === 3 ? 2 : 4);\n\n // Limit to 1000 traces to prevent overwhelming the browser\n if (traces.length >= 1000) break;\n }\n\n return { data: traces };\n}\n\nfunction ibmToIeee(ibmFloat: number) {\n const bytes = new Uint8Array(4);\n bytes[0] = (ibmFloat >> 24) & 0xFF;\n bytes[1] = (ibmFloat >> 16) & 0xFF;\n bytes[2] = (ibmFloat >> 8) & 0xFF;\n bytes[3] = ibmFloat & 0xFF;\n\n let sign = bytes[0] >> 7;\n let exponent = ((bytes[0] & 0x7F) << 1) | (bytes[1] >> 7);\n let fraction = ((bytes[1] & 0x7F) << 16) | (bytes[2] << 8) | bytes[3];\n\n if (exponent === 0 && fraction === 0) return 0;\n\n exponent = (exponent - 64) * 4;\n fraction = fraction / Math.pow(2, 24);\n\n return (sign === 0 ? 1 : -1) * fraction * Math.pow(16, exponent - 6);\n}\n\nconst css = `\nbody {\n font-family: Arial, sans-serif;\n max-width: 800px;\n margin: 0 auto;\n padding: 20px;\n}\n\nh1 {\n color: #333;\n}\n\ninput[type=\"file\"] {\n margin-bottom: 20px;\n}\n`;\n\nexport default async function server(request: Request): Promise {\n const url = new URL(request.url);\n\n if (url.pathname === '/process-default-segy') {\n try {\n const defaultSegyUrl = 'https://github.com/equinor/segyio-notebooks/raw/master/data/basic/3X_75_PR.SGY';\n const response = await fetch(defaultSegyUrl);\n const arrayBuffer = await response.arrayBuffer();\n\n const processedData = processSEGY(new Uint8Array(arrayBuffer));\n\n return new Response(JSON.stringify(processedData), {\n headers: { 'Content-Type': 'application/json' },\n });\n } catch (error) {\n console.error('Error processing default SEG-Y file:', error);\n return new Response('Error processing default SEG-Y file', { status: 500 });\n }\n }\n\n if (url.pathname === '/process-segy') {\n const formData = await request.formData();\n const file = formData.get('segyFile');\n\n if (!file || !(file instanceof File)) {\n return new Response('No file uploaded', { status: 400 });\n }\n\n try {\n const arrayBuffer = await file.arrayBuffer();\n const processedData = processSEGY(new Uint8Array(arrayBuffer));\n\n return new Response(JSON.stringify(processedData), {\n headers: { 'Content-Type': 'application/json' },\n });\n } catch (error) {\n console.error('Error processing SEG-Y file:', error);\n return new Response('Error processing SEG-Y file', { status: 500 });\n }\n }\n\n // Default response for the root path\n return new Response(`\n \n \n SEG-Y File Plotter\n \n \n \n \n

\n \n \n \n \n `,\n {\n headers: {\n \"content-type\": \"text/html\",\n },\n });\n}","/** @jsxImportSource https://esm.sh/react */\nimport React, { useState, useEffect } from \"https://esm.sh/react\";\nimport { createRoot } from \"https://esm.sh/react-dom/client\";\n\nfunction PlotComponent({ data }) {\n useEffect(() => {\n if (data && window.Plotly) {\n console.log(\"Plotting data:\", data.slice(0, 5).map(trace => trace.slice(0, 5)));\n window.Plotly.newPlot('plotDiv', [{\n z: data,\n type: 'heatmap',\n colorscale: 'Seismic',\n }], {\n title: 'Seismic Data',\n xaxis: { title: 'Trace Number' },\n yaxis: { title: 'Sample Number', autorange: 'reversed' },\n width: 800,\n height: 600,\n });\n }\n }, [data]);\n\n return

;\n}\n\nfunction App() {\n const [plotData, setPlotData] = useState(null);\n const [isLoading, setIsLoading] = useState(true);\n\n useEffect(() => {\n fetchDefaultSEGY();\n }, []);\n\n const fetchDefaultSEGY = async () => {\n setIsLoading(true);\n try {\n const response = await fetch('/process-default-segy');\n if (!response.ok) {\n throw new Error('Failed to process default SEG-Y file');\n }\n const data = await response.json();\n console.log(\"Received data:\", data);\n setPlotData(data.data);\n } catch (error) {\n console.error('Error processing default SEG-Y file:', error);\n alert('Error processing default SEG-Y file. Please try uploading your own file.');\n } finally {\n setIsLoading(false);\n }\n };\n\n const handleFileUpload = async (event) => {\n const file = event.target.files[0];\n if (!file) return;\n\n setIsLoading(true);\n\n const formData = new FormData();\n formData.append('segyFile', file);\n\n try {\n const response = await fetch('/process-segy', {\n method: 'POST',\n body: formData,\n });\n\n if (!response.ok) {\n throw new Error('Failed to process SEG-Y file');\n }\n\n const data = await response.json();\n console.log(\"Received data:\", data);\n setPlotData(data.data);\n } catch (error) {\n console.error('Error processing SEG-Y file:', error);\n alert('Error processing SEG-Y file. Please try again.');\n } finally {\n setIsLoading(false);\n }\n };\n\n return (\n

SEG-Y File Plotter

\n \n {isLoading &&

Processing SEG-Y file...

}\n {plotData && }\n

\n );\n}\n\nfunction client() {\n createRoot(document.getElementById(\"root\")).render();\n}\n\nif (typeof document !== \"undefined\") { client(); }\n\nfunction processSEGY(data: Uint8Array) {\n const binaryHeaderOffset = 3200;\n const traceDataOffset = 3600; // Start of trace data\n const traceHeaderSize = 240;\n const samplesPerTraceOffset = 114; // Offset in trace header for number of samples\n\n // Read data sample format code from binary header\n const dataFormatCode = new DataView(data.buffer).getInt16(binaryHeaderOffset + 24, false); // 3225-3226 offset\n console.log(\"Data format code:\", dataFormatCode);\n\n const traces = [];\n let offset = traceDataOffset;\n\n while (offset < data.length) {\n // Read number of samples for this trace\n const samplesPerTrace = new DataView(data.buffer).getUint16(offset + samplesPerTraceOffset, false);\n \n // Skip trace header\n offset += traceHeaderSize;\n\n // Read trace data\n let traceData;\n switch (dataFormatCode) {\n case 1: // 4-byte IBM floating point\n traceData = new Float32Array(samplesPerTrace);\n for (let i = 0; i < samplesPerTrace; i++) {\n traceData[i] = ibmToIeee(new DataView(data.buffer).getUint32(offset + i * 4, false));\n }\n break;\n case 2: // 4-byte fixed point\n traceData = new Int32Array(data.buffer.slice(offset, offset + samplesPerTrace * 4));\n break;\n case 3: // 2-byte fixed point\n traceData = new Int16Array(data.buffer.slice(offset, offset + samplesPerTrace * 2));\n break;\n case 4: // 4-byte fixed point with gain code (not implemented)\n console.warn(\"4-byte fixed point with gain code not implemented\");\n return { data: [] };\n case 5: // 4-byte IEEE floating point\n traceData = new Float32Array(data.buffer.slice(offset, offset + samplesPerTrace * 4));\n break;\n default:\n console.warn(`Unsupported data format code: ${dataFormatCode}`);\n return { data: [] };\n }\n\n traces.push(Array.from(traceData));\n\n offset += samplesPerTrace * (dataFormatCode === 3 ? 2 : 4);\n\n // Limit to 1000 traces to prevent overwhelming the browser\n if (traces.length >= 1000) break;\n }\n\n console.log(\"Processed traces:\", traces.length);\n console.log(\"First trace sample:\", traces[0].slice(0, 5));\n\n return { data: traces };\n}\n\nfunction ibmToIeee(ibmFloat: number) {\n const bytes = new Uint8Array(4);\n bytes[0] = (ibmFloat >> 24) & 0xFF;\n bytes[1] = (ibmFloat >> 16) & 0xFF;\n bytes[2] = (ibmFloat >> 8) & 0xFF;\n bytes[3] = ibmFloat & 0xFF;\n\n let sign = bytes[0] >> 7;\n let exponent = ((bytes[0] & 0x7F) << 1) | (bytes[1] >> 7);\n let fraction = ((bytes[1] & 0x7F) << 16) | (bytes[2] << 8) | bytes[3];\n\n if (exponent === 0 && fraction === 0) return 0;\n\n exponent = (exponent - 64) * 4;\n fraction = fraction / Math.pow(2, 24);\n\n return (sign === 0 ? 1 : -1) * fraction * Math.pow(16, exponent - 6);\n}\n\nconst css = `\nbody {\n font-family: Arial, sans-serif;\n max-width: 800px;\n margin: 0 auto;\n padding: 20px;\n}\n\nh1 {\n color: #333;\n}\n\ninput[type=\"file\"] {\n margin-bottom: 20px;\n}\n`;\n\nexport default async function server(request: Request): Promise {\n const url = new URL(request.url);\n\n if (url.pathname === '/process-default-segy') {\n try {\n const defaultSegyUrl = 'https://github.com/equinor/segyio-notebooks/raw/master/data/basic/3X_75_PR.SGY';\n const response = await fetch(defaultSegyUrl);\n const arrayBuffer = await response.arrayBuffer();\n\n const processedData = processSEGY(new Uint8Array(arrayBuffer));\n\n return new Response(JSON.stringify(processedData), {\n headers: { 'Content-Type': 'application/json' },\n });\n } catch (error) {\n console.error('Error processing default SEG-Y file:', error);\n return new Response('Error processing default SEG-Y file', { status: 500 });\n }\n }\n\n if (url.pathname === '/process-segy') {\n const formData = await request.formData();\n const file = formData.get('segyFile');\n\n if (!file || !(file instanceof File)) {\n return new Response('No file uploaded', { status: 400 });\n }\n\n try {\n const arrayBuffer = await file.arrayBuffer();\n const processedData = processSEGY(new Uint8Array(arrayBuffer));\n\n return new Response(JSON.stringify(processedData), {\n headers: { 'Content-Type': 'application/json' },\n });\n } catch (error) {\n console.error('Error processing SEG-Y file:', error);\n return new Response('Error processing SEG-Y file', { status: 500 });\n }\n }\n\n // Default response for the root path\n return new Response(`\n \n \n SEG-Y File Plotter\n \n \n \n \n

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Diff · v9