Height Map -- Lines

[Halsafar]

Why on earth would this happen (Look at picture)
The lines you see seemingly appear behind me from the point you can see them in the pic onward.
On the way back from the otherside, all you can see above you is some nasty spaces apart lines, it is super ugly...*** is going on.
The vertices MUST be getting listed incorrectly.

Scale = 1024, size = 128.
This is the code which generates the map you see

bool Landscape::GenerateHeightMap(int size, int scale)
{
    FILE *fp;
    
    Segments[0].Size = size;
    Segments[0].Scale = scale;
    int Size = size;
    int Scale = scale;

    unsigned char *hmap = new unsigned char[size*size];
    memset(hmap, 0, sizeof(unsigned char)*size*size);
    
    if ((fp = fopen("image.raw", "rb")) == NULL)
        return false;

    fread(hmap, sizeof(unsigned char), size*size, fp);

    fclose(fp);
    
    Segments[0].NumVertices = Size*Size;
    Segments[0].Vertices = new D3DVERTEX[Segments[0].NumVertices];
    memset(Segments[0].Vertices, 0, Segments[0].NumVertices);

    float texdelta = 2.0f/Size;
    
    D3DVERTEX vert;
    int CurrVertex=0;
    float UTile=12.0f;
    float VTile=12.0f;
    // loop through every pixel in the heightmap
    for (int y=0; y < Size; y++)
    {
        for (int x=0; x < Size; x++)
        {
            // Get the current vertex we want to calculate
            CurrVertex = y*Size+x;
            AddVertice(0,
                       CurrVertex,
                       (float)(x) * Scale,
                       (float)(hmap[CurrVertex] * (Scale/2)),
                       (float)(y) * Scale,
                       UTile * ((float)x * texdelta * 0.5f),
                       VTile * (1.0f - (float)y * texdelta * 0.5f)
                      );
        }
    }

    Segments[0].NumIndices = (Size-1)*(Size-1)*6;
    Segments[0].Indices = new unsigned short[Segments[0].NumIndices];
    memset(Segments[0].Indices, 0, Segments[0].NumIndices);

    int idx=Segments[0].NumIndices;
    for (y=0; y < Size-1; y++)
    {
        for (int x=0; x < Size-1; x++)
        {
            CurrVertex = y*(Size)+x;
            Segments[0].Indices[idx--] = CurrVertex;
            Segments[0].Indices[idx--] = CurrVertex+1;
            Segments[0].Indices[idx--] = CurrVertex+(Size);
            Segments[0].Indices[idx--] = CurrVertex+(Size)+1;
            Segments[0].Indices[idx--] = CurrVertex+(Size);
            Segments[0].Indices[idx--] = CurrVertex+1;
        }
    }

    // we dont need the heightmap anymore, get rid of it
    if (hmap) { delete hmap; hmap = NULL; }
    return true;
} 

Edit:
What type of draw method should I use? STRIP, LIST?
Notice how I am listing the indice backwards...If I don't, then I only seem every 2nd triangle on the terrain unless my camera is below the terrain then I see it all.....

That code is generating enough triangles for the top and bottom to be displayed. I only need to see the top...when the camera is above.

If I do a LINESTRIP it seems every vertice point runs a tangent to an infinite nowhere.