diff --git a/plugins/proto/RemoteFortressReader.proto b/plugins/proto/RemoteFortressReader.proto
index ad630f566..e6e4a3123 100644
--- a/plugins/proto/RemoteFortressReader.proto
+++ b/plugins/proto/RemoteFortressReader.proto
@@ -3,6 +3,78 @@ package RemoteFortressReader;
 //Attempts to provide a complete framework for reading everything from a fortress needed for vizualization
 option optimize_for = LITE_RUNTIME;
 
+//We use shapes, etc, because the actual tiletypes may differ between DF versions.
+enum TiletypeShape {
+	NO_SHAPE = -1;
+	EMPTY = 0;
+	FLOOR = 1;
+	BOULDER = 2;
+	PEBBLES = 3;
+	WALL = 4;
+	FORTIFICATION = 5;
+	STAIR_UP = 6;
+	STAIR_DOWN = 7;
+	STAIR_UPDOWN = 8;
+	RAMP = 9;
+	RAMP_TOP = 10;
+	BROOK_BED = 11;
+	BROOK_TOP = 12;
+	TREE = 13;
+	SAPLING = 14;
+	SHRUB = 15;
+	ENDLESS_PIT = 16;
+}
+
+enum TiletypeSpecial {
+	NO_SPECIAL = -1;
+	NORMAL = 0;
+	RIVER_SOURCE = 1;
+	WATERFALL = 2;
+	SMOOTH = 3;
+	FURROWED = 4;
+	WET = 5;
+	DEAD = 6;
+	WORN_1 = 7;
+	WORN_2 = 8;
+	WORN_3 = 9;
+	TRACK = 10;
+};
+enum TiletypeMaterial {
+	NO_MATERIAL = -1;
+	AIR = 0;
+	SOIL = 1;
+	STONE = 2;
+	FEATURE = 3;
+	LAVA_STONE = 4;
+	MINERAL = 5;
+	FROZEN_LIQUID = 6;
+	CONSTRUCTION = 7;
+	GRASS_LIGHT = 8;
+	GRASS_DARK = 9;
+	GRASS_DRY = 10;
+	GRASS_DEAD = 11;
+	PLANT = 12;
+	HFS = 13;
+	CAMPFIRE = 14;
+	FIRE = 15;
+	ASHES = 16;
+	MAGMA = 17;
+	DRIFTWOOD = 18;
+	POOL = 19;
+	BROOK = 20;
+	RIVER = 21;
+}
+
+message MapBlock
+{
+	required int32 map_x = 1;
+	required int32 map_y = 2;
+	required int32 map_z = 3;
+	repeated TiletypeShape tiletype_shapes = 4;
+	repeated TiletypeSpecial tiletype_specials = 5;
+	repeated TiletypeMaterial tiletype_materials = 6;
+}
+
 message MatPair {
 	required int32 mat_type = 1;
 	required int32 mat_index = 2;
@@ -23,4 +95,22 @@ message MaterialDefinition{
 
 message MaterialList{
 	repeated MaterialDefinition material_list = 1;
+}
+
+message BlockRequest
+{
+	optional int32 blocks_needed = 1;
+	optional int32 min_x = 2;
+	optional int32 max_x = 3;
+	optional int32 min_y = 4;
+	optional int32 max_y = 5;
+	optional int32 min_z = 6;
+	optional int32 max_z = 7;
+}
+
+message BlockList
+{
+	repeated MapBlock map_blocks = 1;
+	optional int32 map_x = 2;
+	optional int32 map_y = 3;
 }
\ No newline at end of file
diff --git a/plugins/remotefortressreader.cpp b/plugins/remotefortressreader.cpp
index b44827c4f..be736eb80 100644
--- a/plugins/remotefortressreader.cpp
+++ b/plugins/remotefortressreader.cpp
@@ -35,11 +35,10 @@
 #include "modules/Maps.h"
 #include "modules/MapCache.h"
 #include "modules/Materials.h"
+#include "TileTypes.h"
 
 //Needed for writing the protobuff stuff to a file.
-#include <fstream>
-#include <string>
-#include <iomanip>
+#include <vector>
 
 #include "RemoteFortressReader.pb.h"
 
@@ -48,13 +47,15 @@
 using namespace DFHack;
 using namespace df::enums;
 using namespace RemoteFortressReader;
-
+using namespace std;
 
 // Here go all the command declarations...
 // mostly to allow having the mandatory stuff on top of the file and commands on the bottom
 
 static command_result GetMaterialList(color_ostream &stream, const EmptyMessage *in, MaterialList *out);
-
+static command_result GetBlockList(color_ostream &stream, const BlockRequest *in, BlockList *out);
+void CopyBlock(df::map_block * DfBlock, RemoteFortressReader::MapBlock * NetBlock);
+void FindChangedBlocks();
 
 
 
@@ -82,6 +83,7 @@ DFhackCExport RPCService *plugin_rpcconnect(color_ostream &)
 {
     RPCService *svc = new RPCService();
 	svc->addFunction("GetMaterialList", GetMaterialList);
+	svc->addFunction("GetBlockList", GetBlockList);
     return svc;
 }
 
@@ -94,6 +96,25 @@ DFhackCExport command_result plugin_shutdown ( color_ostream &out )
     return CR_OK;
 }
 
+uint16_t fletcher16(uint8_t const *data, size_t bytes)
+{
+	uint16_t sum1 = 0xff, sum2 = 0xff;
+
+	while (bytes) {
+		size_t tlen = bytes > 20 ? 20 : bytes;
+		bytes -= tlen;
+		do {
+			sum2 += sum1 += *data++;
+		} while (--tlen);
+		sum1 = (sum1 & 0xff) + (sum1 >> 8);
+		sum2 = (sum2 & 0xff) + (sum2 >> 8);
+	}
+	/* Second reduction step to reduce sums to 8 bits */
+	sum1 = (sum1 & 0xff) + (sum1 >> 8);
+	sum2 = (sum2 & 0xff) + (sum2 >> 8);
+	return sum2 << 8 | sum1;
+}
+
 df::matter_state GetState(df::material * mat, uint16_t temp = 10015)
 {
 	df::matter_state state = matter_state::Solid;
@@ -174,4 +195,40 @@ static command_result GetMaterialList(color_ostream &stream, const EmptyMessage
 		}
 	}
 	return CR_OK;
+}
+
+void CopyBlock(df::map_block * DfBlock, RemoteFortressReader::MapBlock * NetBlock)
+{
+	NetBlock->set_map_x(DfBlock->map_pos.x);
+	NetBlock->set_map_y(DfBlock->map_pos.y);
+	NetBlock->set_map_z(DfBlock->map_pos.z);
+	for (int yy = 0; yy < 16; yy++)
+	{
+		for (int xx = 0; xx < 16; xx++)
+		{
+			df::tiletype tile = DfBlock->tiletype[xx][yy];
+			NetBlock->add_tiletype_shapes((RemoteFortressReader::TiletypeShape)tileShape(tile));
+			NetBlock->add_tiletype_materials((RemoteFortressReader::TiletypeMaterial)tileMaterial(tile));
+			NetBlock->add_tiletype_specials((RemoteFortressReader::TiletypeSpecial)tileSpecial(tile));
+		}
+	}
+}
+
+static command_result GetBlockList(color_ostream &stream, const BlockRequest *in, BlockList *out)
+{
+	for (int zz = in->min_x(); zz < in->max_z(); zz++)
+	{
+		for (int yy = in->min_y(); yy < in->max_y(); yy++)
+		{
+			for (int xx = in->min_x(); xx < in->max_x(); xx++)
+			{
+				df::map_block * block = DFHack::Maps::getBlock(xx, yy, zz);
+				if (block == NULL)
+					continue;
+				RemoteFortressReader::MapBlock *net_block = out->add_map_blocks();
+				CopyBlock(block, net_block);
+			}
+		}
+	}
+	return CR_OK;
 }
\ No newline at end of file