baremaps-dem/src/main/java/org/apache/baremaps/dem/ContourTracer.java [204:214]:
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  private static void validateInput(double[] grid, int width, int height) {
    if (grid == null || grid.length == 0) {
      throw new IllegalArgumentException("Grid array cannot be null or empty");
    }
    if (width <= 0 || height <= 0) {
      throw new IllegalArgumentException("Width and height must be positive");
    }
    if (grid.length != width * height) {
      throw new IllegalArgumentException("Grid array length does not match width * height");
    }
  }
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baremaps-dem/src/main/java/org/apache/baremaps/dem/ElevationUtils.java [119:129]:
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  private static void validateGrid(double[] grid, int width, int height) {
    if (grid == null || grid.length == 0) {
      throw new IllegalArgumentException("Grid array cannot be null or empty");
    }
    if (width <= 0 || height <= 0) {
      throw new IllegalArgumentException("Width and height must be positive");
    }
    if (grid.length != width * height) {
      throw new IllegalArgumentException("Grid array length does not match width * height");
    }
  }
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