Land value

References

1. ^ abOver the 120×100-tile city, the simulation keeps population density, traffic, pollution, land value, and crime in 2×2-tile blocks (60×50), terrain in 4×4 blocks (30×25), and fire coverage, police coverage, commercial location, and growth rate in 8×8 blocks (15×13).CodeMicropolis (SimHacker/micropolis)
   How we know

   167#define SmY		((SimHeight + 7) >>3)
   

   484extern short FireStMap[SmX][SmY];	/* 8X8 Maps  15 x 13 */
   

   Checked against the evidence by its author, an AI model, 2026-10-21.

   Checked by a second AI model, 2026-10-21.

   In the claim ledger

2. ^ abA 2×2 block holding any developed tile (a road or anything numbered above it) gets land value 4 × (34 − its distance from the city center, capped at 32), plus its 4×4 block's terrain value, minus its pollution, minus 20 more where its crime is above 190, held to 1–250. A block with nothing developed gets 0.CodeMicropolis (SimHacker/micropolis)
   How we know

   204	dis = 34 - GetDisCC(x, y);
   

   291  z = (xdis + ydis);
   

   Checked against the evidence by its author, an AI model, 2026-10-21.

   Checked by a second AI model, 2026-10-21.

   In the claim ledger

3. ^A zone's new building takes one of four value classes from its block's land value minus pollution: below 30, below 80, below 150, and 150 or more.CodeMicropolis (SimHacker/micropolis)
   How we know

   295  if (LVal < 150) return (2);
   

   Checked against the evidence by its author, an AI model, 2026-10-21.

   Checked by a second AI model, 2026-10-21.

   In the claim ledger

4. ^A 2×2 block's pollution sums its tiles, held to 255, then is smoothed: heavy-traffic road 75, light-traffic road 50, fire 90, radiation 255, built industrial tiles 50, and seaport, airport, and coal plant tiles 100. Houses, commercial buildings, and the nuclear plant add nothing.CodeMicropolis (SimHacker/micropolis)
   How we know

   260    if (loc >= HTRFBASE) return (/* 25 */ 75);	/* heavy traf  */
   

   191	    Plevel += GetPValue(loc);
   

   Checked against the evidence by its author, an AI model, 2026-10-21.

   Checked by a second AI model, 2026-10-21.

   In the claim ledger

5. ^Crime in a 2×2 block with land value is 128 − land value + population density, held to 300, minus its 8×8 block's police coverage, held to 0–250; a block without land value has none.CodeMicropolis (SimHacker/micropolis)
   How we know

   320	z -= PoliceMap[x >>2][y >>2];
   

   Checked against the evidence by its author, an AI model, 2026-10-21.

   Checked by a second AI model, 2026-10-21.

   In the claim ledger

6. ^Each police station adds the police funding effect, 1000 × spending / requested funds (1000 when nothing is requested), to its 8×8 block, halved if unpowered and, by a change after the original release, halved again if no road touches it. Fire stations fill the fire coverage map the same way. Each map is then smoothed three times, every pass setting a block to half its value plus an eighth of its four neighbours' sum.CodeMicropolis (SimHacker/micropolis)revised
   How we know

   1067      z = z >>1; /* post PD's need roads */
   

   680			    (float)PoliceFund) * 1000.0);
   

   307  SmoothPSMap();
   308  SmoothPSMap();
   309  SmoothPSMap();
   

   81  SmoothFSMap();
   82  SmoothFSMap();
   83  SmoothFSMap();
   

   519      edge = (edge >>2) + PoliceMap[x][y];
   

   Checked against the evidence by its author, an AI model, 2026-10-21.

   Revised after a check by a second AI model, 2026-10-21.

   In the claim ledger