diff --git a/docs/CONFIGURATION.md b/docs/CONFIGURATION.md
index 8533183b..f55d6112 100644
--- a/docs/CONFIGURATION.md
+++ b/docs/CONFIGURATION.md
@@ -149,7 +149,7 @@ To do that, you use these methods:
 * `Layer(layer_name, is_area)`: write this node/way to the named layer. This is how you put objects in your vector tile. is_area (true/false) specifies whether a way should be treated as an area, or just as a linestring.
 * `LayerAsCentroid(layer_name, algorithm, role, role...)`: write a single centroid point for this way to the named layer (useful for labels and POIs). Only the first argument is required. `algorithm` can be "polylabel" (default) or "centroid". The third arguments onwards specify relation roles: if you're processing a multipolygon-type relation (e.g. a boundary) and it has a "label" node member, then by adding "label" as an argument here, this will be used in preference to the calculated point.
 * `Attribute(key,value,minzoom)`: add an attribute to the most recently written layer. Argument `minzoom` is optional, use it if you do not want to write the attribute on lower zoom levels.
-* `AttributeNumeric(key,value,minzoom)`, `AttributeBoolean(key,value,minzoom)`: for numeric/boolean columns.
+* `AttributeNumeric(key,value,minzoom)`, `AttributeInteger(key,value,minzoom)`, `AttributeBoolean(key,value,minzoom)`: for numeric (floating-point), integer and boolean columns.
 * `Id()`: get the OSM ID of the current object.
 * `IsClosed()`: returns true if the current object is a closed area.
 * `IsMultiPolygon()`: returns true if the current object is a multipolygon.
diff --git a/include/attribute_store.h b/include/attribute_store.h
index 75ff6e9c..d5a2d386 100644
--- a/include/attribute_store.h
+++ b/include/attribute_store.h
@@ -42,7 +42,7 @@ class AttributeKeyStore {
 	std::map<const std::string*, uint16_t, string_ptr_less_than> keys2index;
 };
 
-enum class AttributePairType: uint8_t { String = 0, Float = 1, Bool = 2 };
+enum class AttributePairType: uint8_t { String = 0, Float = 1, Bool = 2, Int = 3 };
 // AttributePair is a key/value pair (with minzoom)
 #pragma pack(push, 1)
 struct AttributePair {
@@ -50,32 +50,36 @@ struct AttributePair {
 	AttributePairType valueType : 2;
 	uint8_t minzoom : 5; // Support zooms from 0..31. In practice, we expect z16 to be the biggest minzoom.
 	union {
-		float floatValue_;
+		double doubleValue_;
 		PooledString stringValue_;
 	};
 
 	AttributePair(uint32_t keyIndex, bool value, char minzoom)
-		: keyIndex(keyIndex), valueType(AttributePairType::Bool), minzoom(minzoom), floatValue_(value ? 1 : 0)
+		: keyIndex(keyIndex), valueType(AttributePairType::Bool), minzoom(minzoom), doubleValue_(value ? 1 : 0)
 	{
 	}
 	AttributePair(uint32_t keyIndex, const PooledString& value, char minzoom)
 		: keyIndex(keyIndex), valueType(AttributePairType::String), stringValue_(value), minzoom(minzoom)
 	{
 	}
-	AttributePair(uint32_t keyIndex, float value, char minzoom)
-		: keyIndex(keyIndex), valueType(AttributePairType::Float), minzoom(minzoom), floatValue_(value)
+	AttributePair(uint32_t keyIndex, double value, char minzoom)
+		: keyIndex(keyIndex), valueType(AttributePairType::Float), minzoom(minzoom), doubleValue_(value)
+	{
+	}
+	AttributePair(uint32_t keyIndex, int value, char minzoom)
+		: keyIndex(keyIndex), valueType(AttributePairType::Int), minzoom(minzoom), doubleValue_(static_cast<double>(value))
 	{
 	}
 
 	AttributePair(const AttributePair& other):
 		keyIndex(other.keyIndex), valueType(other.valueType), minzoom(other.minzoom)
 	{
-		if (valueType == AttributePairType::Bool || valueType == AttributePairType::Float) {
-			floatValue_ = other.floatValue_;
+		if (valueType == AttributePairType::String) {
+			stringValue_ = other.stringValue_;
 			return;
 		}
-
-		stringValue_ = other.stringValue_;
+			
+		doubleValue_ = other.doubleValue_;
 	}
 
 	AttributePair& operator=(const AttributePair& other) {
@@ -83,12 +87,12 @@ struct AttributePair {
 		valueType = other.valueType;
 		minzoom = other.minzoom;
 
-		if (valueType == AttributePairType::Bool || valueType == AttributePairType::Float) {
-			floatValue_ = other.floatValue_;
+		if (valueType == AttributePairType::String) {
+			stringValue_ = other.stringValue_;
 			return *this;
 		}
 
-		stringValue_ = other.stringValue_;
+		doubleValue_ = other.doubleValue_;
 		return *this;
 	}
 
@@ -100,30 +104,25 @@ struct AttributePair {
 		if (valueType != other.valueType) return valueType < other.valueType;
 
 		if (hasStringValue()) return pooledString() < other.pooledString();
-		if (hasBoolValue()) return boolValue() < other.boolValue();
-		if (hasFloatValue()) return floatValue() < other.floatValue();
-		throw std::runtime_error("Invalid type in attribute store");
+		return doubleValue_ < other.doubleValue_;
 	}
 
 	bool operator==(const AttributePair &other) const {
 		if (minzoom!=other.minzoom || keyIndex!=other.keyIndex || valueType!=other.valueType) return false;
-		if (valueType == AttributePairType::String)
-			return stringValue_ == other.stringValue_;
-
-		if (valueType == AttributePairType::Float || valueType == AttributePairType::Bool)
-			return floatValue_ == other.floatValue_;
-
-		return true;
+		if (valueType == AttributePairType::String) return stringValue_ == other.stringValue_;
+		return doubleValue_ == other.doubleValue_;
 	}
 
 	bool hasStringValue() const { return valueType == AttributePairType::String; }
 	bool hasFloatValue() const { return valueType == AttributePairType::Float; }
 	bool hasBoolValue() const { return valueType == AttributePairType::Bool; }
+	bool hasIntValue() const { return valueType == AttributePairType::Int; }
 
 	const PooledString& pooledString() const { return stringValue_; }
 	const std::string stringValue() const { return stringValue_.toString(); }
-	float floatValue() const { return floatValue_; }
-	bool boolValue() const { return floatValue_; }
+	float floatValue() const { return static_cast<float>(doubleValue_); }
+	bool boolValue() const { return doubleValue_; }
+	int intValue() const { return static_cast<int64_t>(doubleValue_); }
 
 	void ensureStringIsOwned();
 
@@ -162,7 +161,9 @@ struct AttributePair {
 			const char* data = pooledString().data();
 			boost::hash_range(rv, data, data + pooledString().size());
 		} else if(hasFloatValue())
-			boost::hash_combine(rv, floatValue());
+			boost::hash_combine(rv, doubleValue_);
+		else if(hasIntValue())
+			boost::hash_combine(rv, doubleValue_);
 		else if(hasBoolValue())
 			boost::hash_combine(rv, boolValue());
 		else {
@@ -407,7 +408,8 @@ struct AttributeStore {
 	void finalize();
 
 	void addAttribute(AttributeSet& attributeSet, std::string const &key, const protozero::data_view v, char minzoom);
-	void addAttribute(AttributeSet& attributeSet, std::string const &key, float v, char minzoom);
+	void addAttribute(AttributeSet& attributeSet, std::string const &key, double v, char minzoom);
+	void addAttribute(AttributeSet& attributeSet, std::string const &key, int v, char minzoom);
 	void addAttribute(AttributeSet& attributeSet, std::string const &key, bool v, char minzoom);
 	
 	AttributeStore():
diff --git a/include/osm_lua_processing.h b/include/osm_lua_processing.h
index 72100635..cab3f1f0 100644
--- a/include/osm_lua_processing.h
+++ b/include/osm_lua_processing.h
@@ -195,8 +195,9 @@ class OsmLuaProcessing {
 	
 	// Set attributes in a vector tile's Attributes table
 	void Attribute(const std::string &key, const protozero::data_view val, const char minzoom);
-	void AttributeNumeric(const std::string &key, const float val, const char minzoom);
+	void AttributeNumeric(const std::string &key, const double val, const char minzoom);
 	void AttributeBoolean(const std::string &key, const bool val, const char minzoom);
+	void AttributeInteger(const std::string &key, const int val, const char minzoom);
 	void MinZoom(const double z);
 	void ZOrder(const double z);
 	
diff --git a/resources/process-debug.lua b/resources/process-debug.lua
index 80f875eb..4ea5e629 100644
--- a/resources/process-debug.lua
+++ b/resources/process-debug.lua
@@ -93,7 +93,7 @@ function node_function()
 		Layer("place", false)
 		Attribute("class", place)
 		MinZoom(mz)
-		if rank then AttributeNumeric("rank", rank) end
+		if rank then AttributeInteger("rank", rank) end
 		SetNameAttributes()
 		return
 	end
@@ -107,7 +107,7 @@ function node_function()
 	if natural == "peak" or natural == "volcano" then
 		Layer("mountain_peak", false)
 		SetEleAttributes()
-		AttributeNumeric("rank", 1)
+		AttributeInteger("rank", 1)
 		Attribute("class", natural)
 		SetNameAttributes()
 		return
@@ -256,12 +256,12 @@ function way_function()
 		if linkValues[highway] then
 			splitHighway = split(highway, "_")
 			highway = splitHighway[1]
-			AttributeNumeric("ramp",1)
+			AttributeInteger("ramp",1)
 		end
 
 		local oneway = Find("oneway")
 		if oneway == "yes" or oneway == "1" then
-			AttributeNumeric("oneway",1)
+			AttributeInteger("oneway",1)
 		end
 		if oneway == "-1" then
 			-- **** TODO
@@ -282,7 +282,7 @@ function way_function()
 		local ref = Find("ref")
 		if ref~="" then
 			Attribute("ref",ref)
-			AttributeNumeric("ref_length",ref:len())
+			AttributeInteger("ref_length",ref:len())
 		end
 	end
 
@@ -326,7 +326,7 @@ function way_function()
 		else
 			Layer("waterway_detail", false)
 		end
-		if Find("intermittent")=="yes" then AttributeNumeric("intermittent", 1) else AttributeNumeric("intermittent", 0) end
+		if Find("intermittent")=="yes" then AttributeInteger("intermittent", 1) else AttributeInteger("intermittent", 0) end
 		Attribute("class", waterway)
 		SetNameAttributes()
 		SetBrunnelAttributes()
@@ -419,7 +419,7 @@ function way_function()
 		LayerAsCentroid("poi_detail")
 		SetNameAttributes()
 		if write_name then rank=6 else rank=25 end
-		AttributeNumeric("rank", rank)
+		AttributeInteger("rank", rank)
 	end
 end
 
@@ -437,7 +437,7 @@ function WritePOI(obj,class,subclass,rank)
 	if rank>4 then layer="poi_detail" end
 	LayerAsCentroid(layer)
 	SetNameAttributes(obj)
-	AttributeNumeric("rank", rank)
+	AttributeInteger("rank", rank)
 	Attribute("class", class)
 	Attribute("subclass", subclass)
 end
diff --git a/resources/process-example.lua b/resources/process-example.lua
index cf3266c2..ccf95766 100644
--- a/resources/process-example.lua
+++ b/resources/process-example.lua
@@ -38,7 +38,7 @@ function node_function(node)
 		if amenity~="" then Attribute("class",amenity)
 		else Attribute("class",shop) end
 		Attribute("name:latin", Find("name"))
-		AttributeNumeric("rank", 3)
+		AttributeInteger("rank", 3)
 	end
 	
 	-- Places go to a "place" layer
@@ -48,13 +48,13 @@ function node_function(node)
 		Attribute("class", place)
 		Attribute("name:latin", Find("name"))
 		if place=="city" then
-			AttributeNumeric("rank", 4)
+			AttributeInteger("rank", 4)
 			MinZoom(3)
 		elseif place=="town" then
-			AttributeNumeric("rank", 6)
+			AttributeInteger("rank", 6)
 			MinZoom(6)
 		else
-			AttributeNumeric("rank", 9)
+			AttributeInteger("rank", 9)
 			MinZoom(10)
 		end
 	end
@@ -86,7 +86,7 @@ function way_function()
 	if waterway=="stream" or waterway=="river" or waterway=="canal" then
 		Layer("waterway", false)
 		Attribute("class", waterway)
-		AttributeNumeric("intermittent", 0)
+		AttributeInteger("intermittent", 0)
 	end
 
 	-- Lakes and other water polygons
diff --git a/resources/process-openmaptiles.lua b/resources/process-openmaptiles.lua
index 30aefcae..3158bfba 100644
--- a/resources/process-openmaptiles.lua
+++ b/resources/process-openmaptiles.lua
@@ -177,8 +177,8 @@ function node_function()
 		Layer("place", false)
 		Attribute("class", place)
 		MinZoom(mz)
-		if rank then AttributeNumeric("rank", rank) end
-		if capital then AttributeNumeric("capital", capital) end
+		if rank then AttributeInteger("rank", rank) end
+		if capital then AttributeInteger("capital", capital) end
 		if place=="country" then
 			local iso_a2 = Find("ISO3166-1:alpha2")
 			while iso_a2 == "" do
@@ -203,7 +203,7 @@ function node_function()
 	if natural == "peak" or natural == "volcano" then
 		Layer("mountain_peak", false)
 		SetEleAttributes()
-		AttributeNumeric("rank", 1)
+		AttributeInteger("rank", 1)
 		Attribute("class", natural)
 		SetNameAttributes()
 		return
@@ -314,7 +314,7 @@ function write_to_transportation_layer(minzoom, highway_class, subclass, ramp, s
 	if subclass and subclass ~= "" then
 		Attribute("subclass", subclass)
 	end
-	AttributeNumeric("layer", tonumber(Find("layer")) or 0, accessMinzoom)
+	AttributeInteger("layer", tonumber(Find("layer")) or 0, accessMinzoom)
 	SetBrunnelAttributes()
 	-- We do not write any other attributes for areas.
 	if is_area then
@@ -322,7 +322,7 @@ function write_to_transportation_layer(minzoom, highway_class, subclass, ramp, s
 		return
 	end
 	MinZoom(minzoom)
-	if ramp then AttributeNumeric("ramp",1) end
+	if ramp then AttributeInteger("ramp",1) end
 
 	-- Service
 	if (is_rail or highway_class == "service") and (service and service ~="") then Attribute("service", service) end
@@ -331,7 +331,7 @@ function write_to_transportation_layer(minzoom, highway_class, subclass, ramp, s
 	if is_road then
 		local oneway = Find("oneway")
 		if oneway == "yes" or oneway == "1" then
-			AttributeNumeric("oneway",1)
+			AttributeInteger("oneway",1)
 		end
 		if oneway == "-1" then
 			-- **** TODO
@@ -398,7 +398,7 @@ function way_function()
 		local pop = tonumber(Find("population")) or 0
 		local capital = capitalLevel(Find("capital"))
 		local rank = calcRank(place, pop, nil)
-		if rank then AttributeNumeric("rank", rank) end
+		if rank then AttributeInteger("rank", rank) end
 		SetNameAttributes()
 	end
 
@@ -431,14 +431,14 @@ function way_function()
 		end
 
 		Layer("boundary",false)
-		AttributeNumeric("admin_level", admin_level)
+		AttributeInteger("admin_level", admin_level)
 		MinZoom(mz)
 		-- disputed status (0 or 1). some styles need to have the 0 to show it.
 		local disputed = Find("disputed")
 		if disputed=="yes" then
-			AttributeNumeric("disputed", 1)
+			AttributeInteger("disputed", 1)
 		else
-			AttributeNumeric("disputed", 0)
+			AttributeInteger("disputed", 0)
 		end
 	end
 
@@ -543,7 +543,7 @@ function way_function()
 				local ref = Find("ref")
 				if ref~="" then
 					Attribute("ref",ref)
-					AttributeNumeric("ref_length",ref:len())
+					AttributeInteger("ref_length",ref:len())
 				end
 			end
 		end
@@ -623,7 +623,7 @@ function way_function()
 		else
 			Layer("waterway_detail", false)
 		end
-		if Find("intermittent")=="yes" then AttributeNumeric("intermittent", 1) else AttributeNumeric("intermittent", 0) end
+		if Find("intermittent")=="yes" then AttributeInteger("intermittent", 1) else AttributeInteger("intermittent", 0) end
 		Attribute("class", waterway)
 		SetNameAttributes()
 		SetBrunnelAttributes()
@@ -723,7 +723,7 @@ function way_function()
 		LayerAsCentroid("poi_detail")
 		SetNameAttributes()
 		if write_name then rank=6 else rank=25 end
-		AttributeNumeric("rank", rank)
+		AttributeInteger("rank", rank)
 	end
 end
 
@@ -751,17 +751,17 @@ function WritePOI(class,subclass,rank)
 	if rank>4 then layer="poi_detail" end
 	LayerAsCentroid(layer)
 	SetNameAttributes()
-	AttributeNumeric("rank", rank)
+	AttributeInteger("rank", rank)
 	Attribute("class", class)
 	Attribute("subclass", subclass)
 	-- layer defaults to 0
-	AttributeNumeric("layer", tonumber(Find("layer")) or 0)
+	AttributeInteger("layer", tonumber(Find("layer")) or 0)
 	-- indoor defaults to false
 	AttributeBoolean("indoor", (Find("indoor") == "yes"))
 	-- level has no default
 	local level = tonumber(Find("level"))
 	if level then
-		AttributeNumeric("level", level)
+		AttributeInteger("level", level)
 	end
 end
 
diff --git a/src/attribute_store.cpp b/src/attribute_store.cpp
index facafdbf..73ed4775 100644
--- a/src/attribute_store.cpp
+++ b/src/attribute_store.cpp
@@ -59,8 +59,7 @@ const std::string& AttributeKeyStore::getKeyUnsafe(uint16_t index) const {
 void AttributePair::ensureStringIsOwned() {
 	// Before we store an AttributePair in our long-term storage, we need
 	// to make sure it's not pointing to a non-long-lived std::string.
-	if (valueType == AttributePairType::Bool || valueType == AttributePairType::Float)
-		return;
+	if (valueType != AttributePairType::String) return;
 
 	stringValue_.ensureStringIsOwned();
 }
@@ -251,11 +250,16 @@ void AttributeStore::addAttribute(AttributeSet& attributeSet, std::string const
 	bool isHot = true; // All bools are eligible to be hot pairs
 	attributeSet.addPair(pairStore.addPair(kv, isHot));
 }
-void AttributeStore::addAttribute(AttributeSet& attributeSet, std::string const &key, float v, char minzoom) {
+void AttributeStore::addAttribute(AttributeSet& attributeSet, std::string const &key, double v, char minzoom) {
 	AttributePair kv(keyStore.key2index(key),v,minzoom);
 	bool isHot = v >= 0 && v <= 25 && ceil(v) == v; // Whole numbers in 0..25 are eligible to be hot pairs
 	attributeSet.addPair(pairStore.addPair(kv, isHot));
 }
+void AttributeStore::addAttribute(AttributeSet& attributeSet, std::string const &key, int v, char minzoom) {
+	AttributePair kv(keyStore.key2index(key),v,minzoom);
+	bool isHot = v >= 0 && v <= 25;
+	attributeSet.addPair(pairStore.addPair(kv, isHot));
+}
 
 void AttributeSet::finalize() {
 	// Ensure that values are sorted, giving us a canonical representation,
diff --git a/src/geojson_processor.cpp b/src/geojson_processor.cpp
index 25a5e72d..6a557511 100644
--- a/src/geojson_processor.cpp
+++ b/src/geojson_processor.cpp
@@ -240,10 +240,10 @@ AttributeIndex GeoJSONProcessor::readProperties(const rapidjson::Value &pr, bool
 				layer.attributeMap[key] = 0;
 			} else if (val.isType<int>()) {
 				if (key=="_minzoom") { minzoom=val; continue; }
-				attributeStore.addAttribute(attributes, key, (float)val, 0);
+				attributeStore.addAttribute(attributes, key, (int)val, 0);
 				layer.attributeMap[key] = 1;
 			} else if (val.isType<double>()) {
-				attributeStore.addAttribute(attributes, key, (float)val, 0);
+				attributeStore.addAttribute(attributes, key, (double)val, 0);
 				layer.attributeMap[key] = 1;
 			} else if (val.isType<bool>()) {
 				attributeStore.addAttribute(attributes, key, (bool)val, 0);
@@ -267,7 +267,7 @@ AttributeIndex GeoJSONProcessor::readProperties(const rapidjson::Value &pr, bool
 				attributeStore.addAttribute(attributes, key, it->value.GetBool(), 0);
 				layer.attributeMap[key] = 2;
 			} else if (it->value.IsNumber()) { 
-				attributeStore.addAttribute(attributes, key, it->value.GetFloat(), 0);
+				attributeStore.addAttribute(attributes, key, it->value.GetDouble(), 0);
 				layer.attributeMap[key] = 1;
 			} else {
 				// something different, so coerce to string
diff --git a/src/osm_lua_processing.cpp b/src/osm_lua_processing.cpp
index cba5948c..6778e946 100644
--- a/src/osm_lua_processing.cpp
+++ b/src/osm_lua_processing.cpp
@@ -270,8 +270,12 @@ OsmLuaProcessing::OsmLuaProcessing(
 			[](const std::string &key, const protozero::data_view val, const char minzoom) { osmLuaProcessing->Attribute(key, val, minzoom); }
 	);
 	luaState["AttributeNumeric"] = kaguya::overload(
-			[](const std::string &key, const float val) { osmLuaProcessing->AttributeNumeric(key, val, 0); },
-			[](const std::string &key, const float val, const char minzoom) { osmLuaProcessing->AttributeNumeric(key, val, minzoom); }
+			[](const std::string &key, const double val) { osmLuaProcessing->AttributeNumeric(key, val, 0); },
+			[](const std::string &key, const double val, const char minzoom) { osmLuaProcessing->AttributeNumeric(key, val, minzoom); }
+	);
+	luaState["AttributeInteger"] = kaguya::overload(
+			[](const std::string &key, const int val) { osmLuaProcessing->AttributeInteger(key, val, 0); },
+			[](const std::string &key, const int val, const char minzoom) { osmLuaProcessing->AttributeInteger(key, val, minzoom); }
 	);
 	luaState["AttributeBoolean"] = kaguya::overload(
 			[](const std::string &key, const bool val) { osmLuaProcessing->AttributeBoolean(key, val, 0); },
@@ -919,7 +923,7 @@ void OsmLuaProcessing::Attribute(const string &key, const protozero::data_view v
 	setVectorLayerMetadata(outputs.back().first.layer, key, 0);
 }
 
-void OsmLuaProcessing::AttributeNumeric(const string &key, const float val, const char minzoom) {
+void OsmLuaProcessing::AttributeNumeric(const string &key, const double val, const char minzoom) {
 	if (outputs.size()==0) { ProcessingError("Can't add Attribute if no Layer set"); return; }
 	removeAttributeIfNeeded(key);
 	attributeStore.addAttribute(outputs.back().second, key, val, minzoom);
@@ -933,6 +937,13 @@ void OsmLuaProcessing::AttributeBoolean(const string &key, const bool val, const
 	setVectorLayerMetadata(outputs.back().first.layer, key, 2);
 }
 
+void OsmLuaProcessing::AttributeInteger(const string &key, const int val, const char minzoom) {
+	if (outputs.size()==0) { ProcessingError("Can't add Attribute if no Layer set"); return; }
+	removeAttributeIfNeeded(key);
+	attributeStore.addAttribute(outputs.back().second, key, val, minzoom);
+	setVectorLayerMetadata(outputs.back().first.layer, key, 3);
+}
+
 // Set minimum zoom
 void OsmLuaProcessing::MinZoom(const double z) {
 	if (outputs.size()==0) { ProcessingError("Can't set minimum zoom if no Layer set"); return; }
diff --git a/src/output_object.cpp b/src/output_object.cpp
index e0097a7b..93eef495 100644
--- a/src/output_object.cpp
+++ b/src/output_object.cpp
@@ -49,6 +49,9 @@ void OutputObject::writeAttributes(
 			fbuilder.add_property(key, it->stringValue());
 		} else if (it->hasBoolValue()) {
 			fbuilder.add_property(key, it->boolValue());
+		} else if (it->hasIntValue()) {
+			// could potentially add ,vtzero::sint_value_type(2) to force sint encoding (efficient for -ve ints)
+			fbuilder.add_property(key, it->intValue());
 		} else if (it->hasFloatValue()) {
 			fbuilder.add_property(key, it->floatValue());
 		}
diff --git a/src/shp_processor.cpp b/src/shp_processor.cpp
index 9e56b2ba..d1ed8ffc 100644
--- a/src/shp_processor.cpp
+++ b/src/shp_processor.cpp
@@ -70,10 +70,10 @@ AttributeIndex ShpProcessor::readShapefileAttributes(
 				layer.attributeMap[key] = 0;
 			} else if (val.isType<int>()) {
 				if (key=="_minzoom") { minzoom=val; continue; }
-				attributeStore.addAttribute(attributes, key, (float)val, 0);
+				attributeStore.addAttribute(attributes, key, (int)val, 0);
 				layer.attributeMap[key] = 1;
 			} else if (val.isType<double>()) {
-				attributeStore.addAttribute(attributes, key, (float)val, 0);
+				attributeStore.addAttribute(attributes, key, (double)val, 0);
 				layer.attributeMap[key] = 1;
 			} else if (val.isType<bool>()) {
 				attributeStore.addAttribute(attributes, key, (bool)val, 0);
@@ -88,10 +88,10 @@ AttributeIndex ShpProcessor::readShapefileAttributes(
 			int pos = it.first;
 			string key = it.second;
 			switch (columnTypeMap[pos]) {
-				case 1:  attributeStore.addAttribute(attributes, key, (float)DBFReadIntegerAttribute(dbf, recordNum, pos), 0);
+				case 1:  attributeStore.addAttribute(attributes, key, (int)DBFReadIntegerAttribute(dbf, recordNum, pos), 0);
 				         layer.attributeMap[key] = 1;
 				         break;
-				case 2:  attributeStore.addAttribute(attributes, key, static_cast<float>(DBFReadDoubleAttribute(dbf, recordNum, pos)), 0);
+				case 2:  attributeStore.addAttribute(attributes, key, (double)DBFReadDoubleAttribute(dbf, recordNum, pos), 0);
 				         layer.attributeMap[key] = 1;
 				         break;
 				case 3:  attributeStore.addAttribute(attributes, key, strcmp(DBFReadStringAttribute(dbf, recordNum, pos), "T")==0, 0);
diff --git a/test/attribute_store.test.cpp b/test/attribute_store.test.cpp
index aa3c842f..6058bc89 100644
--- a/test/attribute_store.test.cpp
+++ b/test/attribute_store.test.cpp
@@ -14,14 +14,15 @@ MU_TEST(test_attribute_store) {
 	store.addAttribute(s1, "str2", std::string("a very long string"), 14);
 	store.addAttribute(s1, "bool1", false, 0);
 	store.addAttribute(s1, "bool2", true, 0);
-	store.addAttribute(s1, "float1", (float)42.0, 4);
+	store.addAttribute(s1, "double1", (double)42.0, 4);
+	store.addAttribute(s1, "int1", 43, 8);
 
 	const auto s1Index = store.add(s1);
 
 	mu_check(store.size() == 1);
 
 	const auto s1Pairs = store.getUnsafe(s1Index);
-	mu_check(s1Pairs.size() == 5);
+	mu_check(s1Pairs.size() == 6);
 	const auto str1 = std::find_if(s1Pairs.begin(), s1Pairs.end(), [&store](auto ap) {
 			return ap->keyIndex == store.keyStore.key2index("str1");
 	});
@@ -51,13 +52,21 @@ MU_TEST(test_attribute_store) {
 	mu_check((*bool2)->hasBoolValue());
 	mu_check((*bool2)->boolValue() == true);
 
-	const auto float1 = std::find_if(s1Pairs.begin(), s1Pairs.end(), [&store](auto ap) {
-			return ap->keyIndex == store.keyStore.key2index("float1");
+	const auto double1 = std::find_if(s1Pairs.begin(), s1Pairs.end(), [&store](auto ap) {
+			return ap->keyIndex == store.keyStore.key2index("double1");
 	});
-	mu_check(float1 != s1Pairs.end());
-	mu_check((*float1)->hasFloatValue());
-	mu_check((*float1)->floatValue() == 42);
-	mu_check((*float1)->minzoom == 4);
+	mu_check(double1 != s1Pairs.end());
+	mu_check((*double1)->hasFloatValue());
+	mu_check((*double1)->floatValue() == 42);
+	mu_check((*double1)->minzoom == 4);
+
+	const auto int1 = std::find_if(s1Pairs.begin(), s1Pairs.end(), [&store](auto ap) {
+			return ap->keyIndex == store.keyStore.key2index("int1");
+	});
+	mu_check(int1 != s1Pairs.end());
+	mu_check((*int1)->hasIntValue());
+	mu_check((*int1)->intValue() == 43);
+	mu_check((*int1)->minzoom == 8);
 }
 
 MU_TEST(test_attribute_store_reuses) {